Roller Chain Sprocket; 1-15/16" Bore; 2080-2 Chain; 23 Teeth; 2 Row of Teeth; Hardened Teeth; 7.88" Outside Diameter; 7.413" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 2" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material