Roller Chain Sprocket; 08B-1 Chain; 20 Teeth; 1 Row of Teeth; No Hardened Teeth; 87.808MM Outside Diameter; 81.18MM Pitch Diameter; A-No Hub; Rough Bore Mount; No Bushing; 12.7MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-2 Chain; 20 Teeth; 2 Row of Teeth; No 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