Description:Cat brake pistons used in winch brake groups used for stopping the rotation of boom and load line drums.Attributes:• Material: Steel• Outside Diameter: 183.9 mm (7.240 in)• Inside Diameter: 100 mm (3.937 in)• Width: 37.2 mm (1.464 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.