Roller Chain Sprocket; 2-7/16" Bore; 100 Chain; 30 Teeth; 1 Row of Teeth; No Hardened Teeth; 12.643" Outside Diameter; 11.959" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1-1/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material