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: 103.65 mm (4.0807 in)• Inside Diameter: 42.33 mm (1.6665 in)• Thickness: 18 mm (0.7086 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.