Description:Replacement impeller for torque convertor group.Attributes:• Material: Cast Aluminum• Number of Blades: 18• Outside Diameter: 326.39 mm (12.850 in)• Inside Diameter: 117.35 mm (4.620 in)• Height: 64.72 mm (2.548 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.