Roller Chain Sprocket; 3/4" Bore; 35 Chain; 12 Teeth; 1 Row of Teeth; No Hardened Teeth; 1-5/8" Outside Diameter; 1.449" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 3/8" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material