Specification AutomotiveFitType : universal_fit Brand : TRAILER SUPPLIES BulletPoint1 : Heavy-Duty Compatibility: Designed for 12,000–15,000 lb trailer axles with 12-1/4" x 5" drum size and 7-hole brake flanges. Compatible with Dexter part #K23-442-00 and other major axle brands including AL-KO, Lippert, and Rockwell. BulletPoint2 : Self-Adjusting Performance: Equipped with an internal self-adjusting mechanism that maintains optimal brake shoe tension automatically—ensuring consistent, reliable braking with reduced maintenance. BulletPoint3 : Preassembled for Easy Installation: Each brake assembly comes fully preassembled with shoes, magnets, and springs mounted on a heavy-duty backing plate—ready to install quickly with minimal setup. BulletPoint4 : Built for Demanding Applications: Perfect for use on flatbed trailers, heavy equipment haulers, and dual tandem axle trailers. Trusted by commercial and industrial users for rugged, high-capacity performance. BulletPoint5 : Set Includes: 1 left-hand (driver side) and 1 right-hand (passenger side) self-adjusting electric brake assembly. Mounting hardware not included. BulletPoint6 : Quantity Sold:1pc BulletPoint7 : Stud Thread Size:M10 X 1.50 BulletPoint8 : Engine:V8 5.3 L,V8 6.0 L,V8 8.1 L,V6 4.3 L,V8 4.8 L,V8 5.7 L,V8 6.6 L BulletPoint9 : Built Standard: Care to Meet Industry Standards for Quality Control, Ensuring Reliable and Consistent Performance CompatibleWithVehicleType : Truck IncludedComponents : 1 x Electric Brake Assembly (Left/Driver Side); 1 x Electric Brake Assembly (Right/Passenger Side) ItemName : Trailer Supplies 12-1/4" x 5" Self-Adjusting Electric Trailer Brake Assembly Kit – Left & Right – Fits 12,000–15,000 lb Axles – Heavy-Duty Trailer Brakes for Dexter, Lippert, and More ItemPackageDimensions_Height : 7 inches ItemPackageDimensions_Length : 12 inches ItemPackageDimensions_Width : 12 inches ItemPackageQuantity : 1 ItemTypeKeyword : trailer-brakes Manufacturer : Trailer Supplies ModelName : WA-77-1212 ModelNumber : WA-77-1212 ModelYear : 2025 NumberOfItems : 2 Orientation : Dual PartNumber : WA-77-1212 ProductDescription : Upgrade your trailer’s braking power with this TrailerSupplies 12-1/4" x 5" Self-Adjusting Electric Brake Assembly Set, specially engineered for 12,000 lb trailer axles. This premium brake kit includes one left-hand (driver side) and one right-hand (passenger side) brake assembly — both fully preassembled with brake shoes, springs, and high-performance magnets mounted on heavy-duty backing plates. These self-adjusting electric drum brakes automatically maintain proper tension, reducing wear and simplifying maintenance over time. The assemblies are compatible with Dexter part number K23-442-00 and work with a wide range of heavy-duty trailer axles, including Dexter, AL-KO, Lippert, Rockwell, and others. Crafted with top-grade materials to ensure long-lasting durability and optimal performance, this set is designed for 12-1/4" drum diameters and 5" widths, with a 7-hole brake flange for secure mounting. Perfect for heavy-duty applications such as equipment transport, flatbeds, and dual tandem trailers. ProductSiteLaunchDate : 2025-05-29T22:06:31.882Z Size : 7-Hole for12,000lb SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 25170000 WarrantyDescription : 2-Year Limited Warranty against defects in materials and workmanship. Does not cover misuse, improper installation, or normal wear. Proof of purchase required.