Complete hydraulic drum brake kit has everything needed for a single axle 5-stud wheel trailer, both left and right assemblies. The Galv-X coating on the steel parts make these the most corrosion-resistant drum brake available. Drum hubs are preassembled and pregreased. Features aluminum wheel cylinder, SS springs, hot-dipped galvanized finish, bronze brake pad rivets, cast ball clamp, oversized master cylinder DOT hose kit, brass fittings, and more. 1.719″ seal, 1 3/8″ inner bearing, 1 1/16″ outer bearing. Includes 6600 lb actuator, 2 10″ backing plates, 2 5-stud drums and brake lines. DOT 3 brake fluid not included.