UFP by Dexter A-60 Inner Member, Primary Assembly (2 Axle Disc Brakes) Inner Member Assembly for the UFP A-60 Brake Actuator, 7,500 lb. (2) Axle Disc Brakes Complete with Master Cylinder, Shock Absorber, Rollers, Roller Pins, Latch Assembly, Breakaway Cable and Back-up Solenoid Accepts a 2 inch Ball