Roller Chain Sprocket; 12B-1 Chain; 20 Teeth; 1 Row of Teeth; Hardened Teeth; 131.724MM Outside Diameter; 121.78MM Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-1 Chain; 24 Teeth; 1 Row of Teeth; Hardened Teeth; 156.134MM Outside Diameter; 145.95MM Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material