Description:Cat brake pistons are a critical component in the brake systems that slow, stop, or hold a machine stationary. On Caterpillar machines, they are located at the wheels of wheel-type machines.Attributes:• Cast iron brake piston• Thread Size: M12 (2 Places)• Outside Diameter: 663.58 mm (26.125 in)• Inside Diameter: 520 mm (20.472 in)• Width: 57 mm (2.244 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.