Description:Cat clutch pistons are a key component in the planetary assemblies that power tough Cat transmissions to convert engine power into the exact combination of speed and force required by individual machines.Attributes:• Material: Cast Aluminum• Outside Diameter: 139 mm (5.472 in)• Inside Diameter: 54.25 mm (2.1358 in)• Thickness: 29 mm (1.1417 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.