Description: Sprocket transfers engine power to the link assemblies and engage the link assembly to create motion.Attributes:• Hardened cast iron sprocket• Sprocket Teeth: 21• External Pitch Diameter: 298 mm (11.74 in)• Internal Spline Number of Teeth: 52• Internal Pitch Diameter: 83 mm (3.25 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.