Serious brakes for serious towing. These kits come with everything needed to replace your trailers brakes for faster stopping power. Includes a pair of vented-rotor disc brakes, a brake actuating hitch, brake line kit, free-backing solenoid and all the required hoses, fittings and attachment hardware. GalvX coated rotors resist corrosion and marine-grade aluminum calipers have stainless steel pistons and slider pins. The disc brake actuator hitch features a cast ball clamp and oversized master cylinder with backflow solenoid installed. Fits 13", 14" and 15" wheels. 175lb. capacity.