Description:Replacement impeller for torque convertor group.Attributes:• Material: Cast Aluminum• Number of Blades: 27• Outside Diameter: 478 mm (18.818 in)• Inside Diameter: 134.05 mm (5.277 in)• Height: 133.69 mm (5.263 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.