Info:Martin 50BS10 1 Bored-to-Size Type BS Single Pitch Roller Chain Sprocket With Keyway, 1 in Dia Bore, 2.299 in OD, #50 Chain, 10 Teeth, 5/8 in Pitch, Steel
Info:Martin 50BS10 3/4 Bored-to-Size Type BS Single Pitch Roller Chain Sprocket With Keyway, 3/4 in Dia Bore, 2.299 in OD, #50 Chain, 10 Teeth, 5/8 in Pitch, Steel