Description:Cat clutch pistons are a key component in the planetary assemblies that power tough Cat transmissions to covert engine power into the exact combination of speed and force required by individual machines.Attributes:• Cast iron clutch piston• Five external flanges provide exact OEM fit• Outside Diameter: 536 mm (21.102 in)• Inside Diameter: 438 mm (17.244 in)• Width: 28 mm (1.102 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.