Parts list: № Number Qty Name Options 1 RE304936 6 Spring Assembly W/ Brake Retractor 2 R125666 2 Ring 3 R125667 2 Ring 4 R305833 2 Brake 5 R324914 2 Plate 6 R334180 2 Brake 7 RE591216 2 Brake Disk Next page: ST962349 Brake Valve, PST, W/O Secondary Brake, Air Trailer Brake and Hydraulic Trailer Brake, W/ Front Axle Brake ST959112 Brake Valve, Chassis Wiring Harness, W/ Air Trailer Brake ( - 120004) ST962324 Brake Valve, Chassis Wiring Harness, W/ IVT™, W/ Hydraulic Trailer Brake ( - 120004) ST962236 Brake Valve, PST, W/O Secondary Brake, W/ Hydraulic Trailer Brake ( - 120004) ST963795 Rear Axle Brake Assembly, W/O Front Axle Brakes, W/O Rear Brake Retractors, LH Illustrated ST959116 Brake Valve, W/ Air Trailer Brake ( - 120004) ST993352 Brake Valve, W/ Hydraulic Trailer Brake ST993349 Brake Valve, Chassis Wiring Harness, W/ Hydraulic Trailer Brake ( - 120004) ST972349 Hydraulic Trailer Brake Kit, (For Region 2 and Region 4) ST962240 Brake Valve, PST, W/O Secondary Brake, W/ Hydraulic Trailer Brake ( - 120004)