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• Outside Diameter: 721.8 mm (28.417 in)• Inside Diameter: 530 mm (20.866 in)• Width: 84.94 mm (3.344 in)• Thread Size: M12X1.75 (2 Places)Application:Consult your owner's manual or contact your local Cat Dealer for more information.