Roller Chain Sprocket; 65MM Bore; 80-2 Chain; 37 Teeth; 2 Row of Teeth; No Hardened Teeth; 313.665MM Outside Diameter; 299.51MM Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 25.4MM Chain Pitch; ANSI Roller Chain; Keyway; Steel Material