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:• Cast iron clutch piston• Outside Diameter: 551.34 mm (21.706 in)• Inside Diameter: 448.25 mm (17.647 in)• Width: 32 mm (1.259 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.