Roller Chain Sprocket; 50MM Bore; 16B-1 Chain; 32 Teeth; 1 Row of Teeth; No Hardened Teeth; 273.126MM Outside Diameter; 259.14MM Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 25.4MM Chain Pitch; ISO Roller Chain; Keyway; Brass Material