Description:Coupling for use with the accessory drive group in Cat drive train systems.Attributes:• Hardened steel coupling• Internal Spline Number of Teeth: 9• Outside Diameter: 80 mm (3.149 in)• Inside Diameter: 13.39 mm (0.527 in)• Length: 21 mm (0.826 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.