This Husky Towing left Trailer Brake Assembly fits to 10, 000 pounds axles.• Diameter: 12-1/4 Inch• Width: 3-3/8 Inch• Brake System: Electric• Brake Type: Drum• Axle Weight Capacity: 10000 Pound• Position: Left• Includes Backing Plate: Yes• Includes Brake Shoes: Yes• Includes Magnets: Yes• Includes Actuating Lever: Yes• Includes Adjusting Screw: Yes• Includes Spring Hardware: Yes Less Chance Of Cracking & Crumbling That Can Lead To Mechanical Lockup E-Coated Backing Plate Resists Wear & Corrosion Limited 1 Year Warranty | Husky Towing Self-Adjusting Electric Trailer Brake Assembly - 12.25x3.375" - 10,000lb - Left Hand