Info:Martin 35BS10 5/8 Bored-to-Size Type BS Single Pitch Roller Chain Sprocket With Keyway, 5/8 in Dia Bore, 1.379 in OD, #35 Chain, 10 Teeth, 3/8 in Pitch, Steel
Info:Martin 35BS11 1/2 Bored-to-Size Type BS Single Pitch Roller Chain Sprocket, 1/2 in Dia Bore, 1.502 in OD, #35 Chain, 11 Teeth, 3/8 in Pitch, Steel