Description:Replacement impeller for torque convertor group.Attributes:• Material: Cast Aluminum• Number of Blades: 31• Outside Diameter: 405.0 mm (15.94 in)• Inside Diameter: 125 mm (4.92 in)• Length: 72.50 mm (2.85 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.