Description: Sprocket transfers engine power to the link assemblies and engage the link assembly to create motion.Attributes:• Material: Steel• Hardened• Sprocket Teeth: 20• Internal Spline Number of Teeth: 57• Hub Width: 57.15 mm (2.250 in)• External Pitch Diameter: 324.74 mm (12.785 in)• Internal Pitch Diameter: 90.488 mm (3.562 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.