+971 50 443 1871
New
Knorr-Bremse Four Circuit Prot. Valve II37680N50
Contact us on WhatsApp for Wholesale Only
! We only accept wholesale orders. Minimum quantity: 5 items.
II37680N50, I I37 680 N50, I.I37.680.N50
Product Overview
The II37680N50 is a robust four-circuit protection valve that manages air supply to various sub-systems such as brakes, suspension, and auxiliary components. It ensures priority filling and protection against air loss in the event of leakage in one or more circuits.
Key Features
- OEM Part Number: II37680N50
- Manufacturer: Knorr-Bremse
- Function: Distributes and regulates compressed air to four independent circuits
- Prevents total system failure in case of air loss in one circuit
- Compact design with durable construction for long service life
- Suitable for heavy-duty trucks, trailers, and buses
Applications & Compatibility
Used in various commercial vehicles from European manufacturers such as Mercedes-Benz, MAN, Volvo, DAF, and Scania. Compatible with both OEM setups and replacement for service workshops.
Why Buy from AAA Trading Dubai?
- We are a trusted wholesale distributor of Knorr-Bremse parts in the GCC
- All parts are factory-sealed and 100% authentic
- Bulk availability and tiered discounts for fleet buyers
- Technical support and expert consultation available
- Worldwide export with documentation support
Warranty & Quality Assurance
All Knorr-Bremse valves, including the II37680N50, come with a 12-month manufacturer warranty. Products are supplied in new condition with full traceability and batch records.
Contact Us
To request a quote or place a wholesale order, contact our team today.
AAA Trading Dubai – Auto Parts Wholesalers
Phone: +971 50 443 1871
Shipping & Delivery
Shipping & Delivery Policy
Shipping & Delivery Policy
At Triple A Trading, we are committed to fast, reliable shipping to ensure our clients receive their automotive spare parts without unnecessary delays. We are a registered business in Dubai, United Arab Emirates. For more information about business registration, please visit the Dubai Trade Portal.
Order Processing Time
All orders are processed within 1-3 business days following payment confirmation. You'll receive a notification once your order has been dispatched.
Shipping Options & Delivery Timeframes
- Standard Shipping – Delivered within 5-7 business days
- Expedited Shipping – Delivered within 3-5 business days
- Express Shipping – Delivered within 1-3 business days
Shipping Costs
Shipping rates are calculated based on your order’s weight and destination. The total shipping cost will be clearly displayed at checkout before finalizing your order.
International Shipping
We proudly serve customers across Africa, Europe, Asia, and the Middle East. Please note that international shipments may be subject to customs duties and taxes, which are the customer’s responsibility.
Triple A Trading works diligently to ensure smooth cross-border deliveries, minimizing delays due to customs or political complications. For more details, please refer to the Dubai Customs official website.
Order Tracking
Once your order ships, you'll receive a tracking number via email, which can be used to monitor the shipment through the carrier's website.
Delivery Issues
If you experience any issues with your delivery, such as delays or missing items, please contact our customer service team:
- Email: sales@triple-a-trading.com
- Phone: +971 50 443 1871
We’re here to assist you and ensure your order is resolved quickly and efficiently.
Thank you for choosing Triple A Trading – Your trusted source for quality automotive spare parts, delivered with speed and care.
Frequently Asked Questions (FAQ)
Frequently Asked Questions – Knorr-Bremse Four Circuit Protection Valve II37680N50
What is the function of the Knorr-Bremse II37680N50 Four Circuit Protection Valve?
This valve controls the distribution of compressed air to four separate circuits in a commercial vehicle. It ensures proper priority filling and protects remaining systems in case one circuit fails or leaks.Is this valve compatible with all commercial vehicles?
The II37680N50 is compatible with most European truck and trailer brands such as Volvo, MAN, Scania, Mercedes-Benz, and DAF, provided they use OEM-compatible braking systems. Always verify with the part number or vehicle VIN.Is the Knorr-Bremse II37680N50 an OEM product?
Yes, it is a genuine OEM-manufactured part. AAA Trading Dubai – Auto Parts Wholesalers supplies only original Knorr-Bremse components sealed from the factory.What are the benefits of using a genuine Knorr-Bremse protection valve?
- Reliable air circuit protection for commercial braking systems
- Reduces the risk of complete air system failure
- Ensures compliance with European safety standards
- Longer service intervals and lower maintenance cost
Do you offer volume discounts for fleet buyers?
Yes, we provide wholesale pricing with tiered discounts starting from 5+ units. Large fleet operators and service centers receive additional pricing and shipping benefits.What is included when purchasing the II37680N50 valve?
Each unit is individually packed and sealed, with Knorr-Bremse part number labeling and quality assurance documentation where applicable.Is warranty included?
Yes, the Knorr-Bremse II37680N50 is covered under a 12-month manufacturer's warranty against defects under normal operating conditions.Can you ship this valve internationally?
Yes. We offer global shipping with full export support, including:- HS code documentation
- Commercial invoice and packing list
- Certificate of Origin (on request)
- OEM compliance documentation if required
How can I place a wholesale order?
You can contact our team via phone or email for pricing, availability, and logistics coordination. AAA Trading Dubai – Auto Parts Wholesalers Phone: +971 50 443 1871Related products
Knorr-Bremse EBS Trailer Control Module K020623N50 – MAN
K020623N50, K 020 623 N50, K.020.623.N50
Buy Wholesale Knorr-Bremse EBS Trailer Control Module K020623N50 - MAN Online. The Knorr-Bremse EBS Trailer Control Module K020623N50 is a cutting-edge electronic control unit designed specifically for MAN trailers. Engineered by Knorr-Bremse, a renowned leader in the field of braking systems, this module ensures optimal performance, safety, and efficiency in trailer braking operations. With advanced features and robust construction, it empowers trailers to adhere to stringent safety standards while delivering reliable braking performance across various road conditions.Technical Specifications:
Manufacturer: Knorr-Bremse Model: EBS Trailer Control Module K020623N50 Compatibility: MAN trailers Part Number: K020623N50 Functionality: Trailer braking control, anti-lock braking system (ABS), electronic stability program (ESP), brake force distribution Communication Protocol: CAN (Controller Area Network) Operating Voltage: 12V or 24V DC Operating Temperature: -40°C to +85°C Protection Class: IP67 (Dust tight and protected against immersion in water up to 1 meter) Dimensions: Compact form factor for easy integration into trailer systems Certification: Compliant with relevant automotive safety standards and regulationsPart Number:
Brand: Knorr-Bremse Category: Braking System Sub-Category: Braking System Description: EBS Trailer Control Module Part Number 1: K020623N50 Compatible with: MAN WG:560 OE Number 1: 81.52301.6207 OE Number 2: 81.52301.6212 OE Number 3: 81.52301.6213 OE Number 4: 81.52301.6209
Knorr-Bremse Caliper – Rationalized K052390K50
K052390K50, K 052 390 K50, K.052.390.K50
Buy Wholesale Knorr-Bremse Caliper - Rationalized K052390K50 Online. The Knorr-Bremse Caliper Rationalized K052390K50 is a cutting-edge brake caliper engineered to deliver optimal performance and reliability in heavy-duty applications. Crafted with precision engineering and advanced materials, this caliper ensures superior braking efficiency, safety, and longevity, meeting the rigorous demands of commercial vehicles and industrial machinery. Its streamlined design and innovative features make it a trusted choice for heavy-duty braking systems.Technical Specifications:
Model: K052390K50 Manufacturer: Knorr-Bremse Application: Heavy-duty commercial vehicles, industrial machinery Material: High-strength alloy Brake Type: Hydraulic Piston Diameter: [Insert Piston Diameter] Operating Pressure Range: [Insert Operating Pressure Range] Temperature Range: [Insert Temperature Range] Weight: [Insert Weight] Dimensions: [Insert Dimensions] Features: Advanced materials for enhanced durability and heat dissipation Hydraulic system for precise braking control Designed for heavy-duty applications Streamlined and rationalized design for improved performance Compatible with standard brake systemsPart Number:
Description: Caliper - Rationalized Part Number 1: K052390K50 Part Number 2: SM7002RC
Knorr-Bremse EBS One Channel Module 0486203023N50
0486203023N50, 0 486 203 023 N50, 0.486.203.023.N50
Product Overview
The Knorr-Bremse EBS One Channel Module 0486203023N50 is a critical component in electronically controlled braking systems (EBS) for heavy-duty commercial vehicles. Engineered for precision and rapid response, this module controls braking pressure electronically on individual wheel ends, ensuring enhanced safety, improved braking stability, and reduced stopping distances. Built with Knorr-Bremse’s leading-edge technology, this one-channel modulator is an integral part of modern trailer and truck EBS architectures.Key Features
- OEM Part Number: 0486203023N50
- Function: Electronic modulation of brake pressure on a single axle or wheel
- Technology: Digital signal interface with integrated diagnostics
- Design: Compact, vibration-resistant aluminum housing with factory-sealed electronics
- Voltage: 24V DC system compatibility
- Communication: Compatible with ISO CAN protocols for vehicle networks
- Integrated Safety: Fail-safe design with fallback modes
- Approvals: Compliant with ISO 26262, ECE R13, and automotive EMC standards
- Country of Origin: Germany
What’s Included in the Kit
- 1 x Knorr-Bremse EBS One Channel Module (Part No. 0486203023N50)
- Factory-fitted connector plug (pre-attached or included)
- Mounting instructions or technical drawing (available upon request)
- OEM packaging with barcode and part identification
Wholesale Buyer Benefits
- Competitive pricing for distributors, fleets, and OEM suppliers
- Rapid dispatch from AAA Trading’s Dubai warehouse
- Support for bulk or containerized shipments with consolidated invoicing
- Documentation for tenders, re-exports, and customs clearance
- Dedicated technical support and reordering service for repeat clients
Applications and Compatibility
The 0486203023N50 EBS Module is typically installed in:- Heavy-duty trailers with electronically controlled braking systems (EBS)
- Semi-trailers and tankers equipped with Knorr-Bremse EBS Gen 2/Gen 3
- Commercial fleets using advanced telematics and load-sensing brake control
- Compatible with truck OEMs including Mercedes-Benz, Volvo, DAF, and Scania (depending on system version)
Warranty and Product Authenticity
- 12-month limited manufacturer warranty
- 100% genuine Knorr-Bremse component, batch-traceable
- Delivered in original packaging with factory label and barcode
- Certification available upon request for large-scale or government tenders
Why Choose AAA Trading Dubai
- Leading supplier of authentic European truck and trailer components
- Warehouse and logistics center in Dubai for efficient global dispatch
- Technical expertise in EBS, ABS, pneumatic, and braking systems
- Professional support for workshops, resellers, and fleet operators
- Trusted by clients across the Middle East, Africa, and South Asia
Knorr-Bremse Caliper – Rationalized K026763
K026763, K 026 763, K.026.763
Buy Wholesale Knorr-Bremse Caliper - Rationalized K026763 Online. The Knorr-Bremse Caliper, Rationalized K026763, represents a pinnacle of precision engineering and reliability in braking systems. Crafted by Knorr-Bremse, a global leader in braking solutions, this caliper exemplifies innovation and performance. Designed for heavy-duty applications, it offers optimal braking efficiency and durability, ensuring safety and stability in demanding operating conditions.Technical Specifications:
Manufacturer: Knorr-Bremse Model: Rationalized K026763 Application: Heavy-duty vehicles, commercial trucks, buses, and industrial machinery Material: High-strength alloy steel Piston Diameter: Varied options available (customizable) Piston Type: Single or multiple pistons (configurable) Piston Material: High-performance composite or stainless steel Sealing: Advanced rubber compounds for enhanced durability and sealing integrity Mounting: Bolt-on design for easy installation and maintenance Finish: Corrosion-resistant coating for prolonged service life Operating Temperature Range: -40°C to 150°C (-40°F to 302°F) Compliance: Meets or exceeds industry standards for safety and performancePart Number:
Description: Caliper - Rationalized Part Number 1: K026763 Part Number 2: SN7366RC
Knorr-Bremse Caliper – Rationalized K003810
K003810, K 003 810, K.003.810
Buy Wholesale Knorr-Bremse Caliper - Rationalized K003810 Online. The Knorr-Bremse Caliper - Rationalized K003810 is a cutting-edge braking system component engineered to deliver superior performance and reliability in automotive and industrial applications. Designed by Knorr-Bremse, a global leader in braking solutions, this caliper embodies precision engineering and innovative design, ensuring optimal braking efficiency and safety under various operating conditions. Its streamlined design and advanced materials result in a compact yet robust construction, allowing for seamless integration into diverse vehicle architectures. With meticulous attention to detail and stringent quality standards, the Knorr-Bremse Caliper - Rationalized K003810 sets a new benchmark for braking excellence.Technical Specifications:
Manufacturer: Knorr-Bremse Model: Caliper - Rationalized K003810 Application: Automotive and industrial braking systems Material: High-strength alloy steel Compatibility: Compatible with a wide range of vehicle platforms Piston Diameter: Variable, depending on application requirements Piston Type: Floating or fixed, depending on model variant Operating Pressure: Up to X bar (dependent on model variant) Temperature Range: -40°C to +150°C Weight: Varies according to configuration Finish: Corrosion-resistant coating for extended durability Certification: Compliant with international safety and quality standards, including ISO and SAE regulations Warranty: Manufacturer's standard warranty appliesPart Number:
Description: Caliper - Rationalized Part Number 1: K003810 Part Number 2: SN7216RC
Knorr-Bremse Four Circuit Prot. Valve II37460N00
II37460N00, I I37 460 N00, I.I37.460.N00
Product Overview
The Knorr-Bremse Four Circuit Protection Valve II37460N00 is a high-performance air distribution and safety component engineered to regulate and protect multiple air brake circuits in heavy-duty commercial vehicles. It divides the air supply into four independently controlled circuits—typically service front, service rear, parking, and auxiliary systems—while ensuring pressure balance and circuit isolation in the event of a failure. Trusted by vehicle OEMs worldwide, this valve delivers optimal reliability and safety compliance.Key Features
- OEM Part Number: II37460N00
- Function: Regulates and protects 4 pneumatic brake circuits
- Standard pressure release threshold: 6.5–8.5 bar (configurable)
- Integrated non-return valves and pressure limiting features
- High-grade aluminum alloy body with corrosion-resistant finish
- Compact, modular design for direct chassis or frame installation
- Air ports conform to ISO 7628 / DIN 74324 standards
- Factory-tested for leak-tightness and functional response
- Complies with ECE R13 and international brake safety regulations
- Country of Origin: Germany
What’s Included in the Kit
- 1 x Knorr-Bremse Four Circuit Protection Valve II37460N00
- Sealed in OEM box with part label and traceable serial number
- Mounting and air port diagram included (digital copy on request)
- Ready-to-install, no additional accessories required
Wholesale Buyer Benefits
- Attractive bulk pricing through AAA Trading Dubai
- Fast availability from UAE stock for GCC and global shipments
- Support for cross-referencing older valve part numbers
- Dedicated commercial support for tenders and fleet orders
- Flexible packaging and logistics for export orders
Applications and Compatibility
The II37460N00 is compatible with:- Commercial trucks, buses, and trailers with air brake systems
- Used in OEM builds from Mercedes-Benz, MAN, Scania, Volvo, Renault, DAF, and Iveco
- Ideal for aftermarket replacement of Knorr-Bremse and other equivalent valves
- Suitable for both rigid and articulated commercial vehicles
Warranty and Product Authenticity
- 12-month limited warranty from Knorr-Bremse
- 100% genuine and traceable OEM component
- Meets or exceeds all relevant OE and international safety standards
- Sealed packaging with serial and batch control
Why Choose AAA Trading Dubai
- Authorized distributor of genuine Knorr-Bremse pneumatic components
- Strong inventory position in brake valves, dryers, and air modules
- Strategic logistics hub in Dubai for fast export across regions
- Technical guidance and customer-focused after-sales support
- Serving fleets, workshops, and parts distributors across Middle East, Africa, and South Asia
Knorr-Bremse EAC Air Processing Unit K138267N50
K138267N50, K 138 267 N50, K.138.267.N50
Product Overview
The Knorr-Bremse K138267N50 is a high-efficiency EAC (Electronic Air Control) Air Processing Unit designed to manage compressed air supply in commercial vehicle braking systems. Integrated with electronic control, filtration, and regeneration features, this APU ensures optimum air quality, system pressure management, and safety across various heavy-duty applications. Built to original equipment standards, it guarantees reliability and long service life in demanding fleet operations.Key Features
- Brand: Knorr-Bremse
- Part Number: K138267N50
- Function: Electronic Air Processing Unit with integrated air dryer
- Electronic control of air regeneration cycles
- Integrated four-circuit protection
- Supports optimized compressor duty cycles and fuel efficiency
- Robust construction for vibration and pressure resistance
- OE-grade connections for air lines and harness
What’s Included in the Kit
- 1 x Knorr-Bremse EAC APU – K138267N50
- Pre-installed cartridges and valves (as supplied)
- Genuine Knorr-Bremse packaging and traceable label
Wholesale Buyer Benefits
- Direct OE replacement for European commercial vehicles
- Trusted by fleet service networks and logistics operators
- Export stock available from AAA Trading Dubai
- Bulk order support for workshops and vehicle rebuilders
- Technical lookup assistance via OE part number
Applications and Compatibility
- Used in trucks, buses, and heavy-duty vehicles from leading OEMs (MAN, DAF, Mercedes-Benz, Volvo, etc.)
- Suitable for Euro 4, Euro 5, and Euro 6 braking systems
- Replaces older APUs with electronic control integration
- OE Cross References: Confirm with VIN or vehicle build sheet
Warranty and Product Authenticity
- 100% Genuine Knorr-Bremse product
- 12-month warranty against manufacturing defects
- Manufactured to ISO/TS 16949 standards
- Barcode-labeled for traceability and authenticity
Why Choose AAA Trading Dubai
- Authorized exporter of Knorr-Bremse air brake components
- Fast, reliable global shipping from our Dubai warehouse
- Dedicated support for fleet managers, mechanics, and resellers
- VIN/OE matching to ensure correct fitment
Knorr-Bremse Hand Brake Valve K038808N50
K038808N50, K 038 808 N50, K.038.808.N50
Product Overview
The Knorr-Bremse Hand Brake Valve K038808N50 is a high-performance mechanical control valve used in commercial vehicles for parking and emergency braking functions. This lever-operated valve provides reliable, manual control over spring brake actuators, ensuring safety during parking and stationary conditions. Developed to meet OEM specifications, it is designed for durability and precision in demanding fleet environments.Key Features
- OEM Part Number: K038808N50
- Function: Hand-operated control valve for spring brake systems
- Single-circuit manual valve with secure locking positions
- Compact design with robust metal lever
- High-quality internal sealing for minimal air leakage
- Operating pressure: Up to 10 bar
- Mounting orientation: Dash or panel mount
- Color-coded ports for easy installation
- Country of Origin: Germany
What’s Included in the Kit
- 1 x Knorr-Bremse Hand Brake Valve K038808N50
- Factory-sealed packaging with OEM label and part number
- Mounting hardware and installation instructions (where applicable)
Wholesale Buyer Benefits
- Bulk purchase pricing available for fleets and resellers
- Stock available from AAA Trading Dubai warehouse
- Fast delivery across MENA and export regions
- Dedicated support for application matching and technical inquiries
- Genuine OE replacement parts for workshop confidence
Applications and Compatibility
The K038808N50 Hand Brake Valve is suitable for:- Heavy-duty trucks, trailers, and buses equipped with air brake systems
- Vehicles fitted with Knorr-Bremse spring brake actuators
- Compatible with leading OEMs such as MAN, DAF, Mercedes-Benz, Volvo, Scania, Renault, and Iveco
- Retrofit or replacement of older Knorr-Bremse hand brake valves (verify interface)
Warranty and Product Authenticity
- 12-month manufacturer warranty
- Guaranteed genuine Knorr-Bremse product
- Supplied in original OEM packaging with traceable part number
- Conforms to EU safety and manufacturing standards
Why Choose AAA Trading Dubai
- Reliable source for authentic Knorr-Bremse brake components
- Well-stocked inventory for immediate availability
- Expert guidance for part identification and installation
- Strategically located in Dubai for regional and global logistics
- Trusted by workshops, fleets, and parts resellers worldwide
Knorr-Bremse Caliper – Rationalized K002964
K002964, K 00 29 64, K.00.29.64
Product Overview
The Knorr-Bremse Caliper K002964 is a rationalized, factory-assembled brake caliper unit designed for high-performance air disc brake systems on commercial vehicles. It belongs to Knorr-Bremse’s industry-leading SN/SM brake family and is engineered for maximum reliability, safety, and ease of maintenance. This caliper is ideal for vehicle applications requiring consistent braking force, extended service intervals, and compliance with stringent safety standards.Key Features
- OEM Part Number: K002964
- Type: Rationalized Left-Hand Side Air Disc Brake Caliper
- Application: Axle-mount (steer or drive axle, depending on configuration)
- Caliper Family: SN7 / SM7 platform (optimized housing and performance)
- Material: Heavy-duty cast iron with corrosion-resistant coating
- Includes pre-installed tappets, guides, and protective boots
- Brake pad interface: Compatible with standard Knorr-Bremse pad sets
- Service-Friendly: Designed for quick replacement and low maintenance
- Certifications: ECE R90, ISO/TS 16949 compliant
- Country of Origin: Germany
What’s Included in the Kit
- 1 x Knorr-Bremse Caliper Assembly (Part No. K002964)
- Integrated guide pins, boots, and tappet system
- Protective transport packaging with secure mount points
- Manufacturer barcode and QR traceability label
- Technical leaflet or installation torque specifications (available on request)
Wholesale Buyer Benefits
- Volume discounts and B2B pricing for fleet and trade partners
- Direct availability from AAA Trading’s Dubai warehouse
- Support for container orders and consolidated shipping
- Product sourcing for mixed OEM part requirements
- Dedicated team for quotation, logistics, and documentation support
Applications and Compatibility
The Knorr-Bremse K002964 caliper is compatible with:- Heavy-duty trucks and buses equipped with SN7 or SM7 air disc brake systems
- Axle platforms from OEMs including Mercedes-Benz, MAN, Volvo, DAF, Scania, and Iveco
- Aftermarket or OE service replacement for Knorr-Bremse disc brake systems
- Suitable for steer or drive axle configurations depending on vehicle design
Warranty and Product Authenticity
- 12-month limited warranty from the date of purchase
- Genuine Knorr-Bremse product with serialized factory ID
- Sealed packaging with tamper-evident labels
- Traceable batch/lot numbers for quality assurance
Why Choose AAA Trading Dubai
- Trusted distributor of genuine European commercial vehicle components
- Based in Dubai with strategic access to Middle East, Africa, and Asia
- Strong specialization in Knorr-Bremse braking systems and accessories
- Full range of support: quoting, shipping, and technical assistance
- Serving fleet managers, garages, wholesalers, and government contracts
Knorr-Bremse Caliper – Rationalized K003809
K003809, K 003 809, K.003.809
Product Overview
The Knorr-Bremse K003809 is a rationalized disc brake caliper designed for commercial vehicle air disc braking systems. Engineered with durability and maintenance efficiency in mind, this caliper features Knorr-Bremse's advanced brake technology to ensure consistent braking performance, reliability, and extended service life. Ideal for fleet applications, the K003809 is a cost-effective replacement caliper compatible with a wide range of truck and trailer systems.
Key Features
- Manufacturer: Knorr-Bremse
- Part Number: K003809
- Type: Rationalized Caliper (Air Disc Brake)
- Durable cast housing for heavy-duty applications
- Integrated wear indicators and pad retaining system
- Designed for quick service and reduced downtime
- Compatible with SB/SN/SK-type caliper mounting systems
What’s Included
- 1 x Knorr-Bremse Caliper – K003809 (Rationalized Unit)
- Fitted guide sleeve and hardware (model dependent)
Wholesale Buyer Benefits
- OEM-quality caliper for commercial brake system refurbishments
- Available in large volumes for fleets, workshops, and distributors
- Backed by AAA Trading Dubai’s export expertise
- Compatible with multiple OE and reman platforms
Applications and Compatibility
The Knorr-Bremse K003809 caliper is suitable for use in:
- Heavy-duty trucks and trailers
- Bus and coach applications
- Compatible with various axle configurations (verify model)
- Cross Reference: KNORR-BREMSE SB7, SN6, and similar caliper families
Please confirm dimensions, axle mounting, and service type before ordering.
Warranty and Product Authenticity
- 100% Genuine Knorr-Bremse component
- Supplied in original manufacturer packaging
- 12-month limited warranty (terms apply)
Why Choose AAA Trading Dubai
- Direct distributor of Knorr-Bremse and commercial braking parts
- VIN/OE support and technical matching for fleet applications
- Bulk-ready logistics and shipping support to all regions
- Trusted by workshops and OEM rebuilders across MENA and Europe
Reviews
There are no reviews yet.