This Lippert Components right Trailer Brake Assembly fits to 3, 500 pounds axles. It includes backing plate, shoe and lining kit, magnet kit, adjusting screw and spring hardware. Specifications•Diameter: 10 Inch•Width: 2-1/4 Inch•Brake System: Electric•Brake Type: Drum•Axle Weight Capacity: 3500 Pound•Position: Right•Includes Backing Plate: Yes•Includes Brake Shoes: Yes•Includes Magnets: Yes•Includes Actuating Lever: Yes•Includes Adjusting Screw: Yes•Includes Spring Hardware: Yes•Estimated Install Time (Hours):0.5 Drum Brakes 3500 Pound Axle Capacity With Backing Plate. Shoe And Lining Kit, Magnet Kit, Adjusting Screw, Spring Hardware | Electric Trailer Brake Assembly - 10" x 2.25" 3,500-lb. Axles, Right Side