Roller Chain Sprocket; 1-3/8" Bore; 160 Chain; 11 Teeth; 1 Row of Teeth; Hardened Teeth; 8.012" Outside Diameter; 7.1" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 2" Chain Pitch; ANSI Roller Chain; Keyway; Carbon Steel Material