Roller Chain Sprocket; 2-15/16" Bore; 80-2 Chain; 38 Teeth; 2 Row of Teeth; Hardened Teeth; 12.668" Outside Diameter; 12.11" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material