Roller Chain Sprocket; 08B-1 Chain; 25 Teeth; 1 Row of Teeth; No Hardened Teeth; 102.5MM Outside Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 12.7MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 16MM Bore; 12B-2 Chain; 20 Teeth; 2 Row of Teeth; No Hardened Teeth; 130.5MM Outside Diameter; A-No Hub; Finished Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; Keyway; Steel Material