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Info:TRITAN® 140C70 X 3 15/16 Standard Hub Type C Single Strand Precision Roller Chain Sprocket, 3-15/16 in Dia Bore, 40.02 in OD, 140 Chain, 70 Teeth, 1-3/4 in Pitch, Forged Steel
Info:Martin 140E20H Type B Single Strand Welded Bushed Roller Chain Sprocket With Hardened Teeth, 0.875 to 3.313 in Dia Bore, 12.099 in OD, #140 Chain, 20 Teeth, 1-3/4 in Pitch, Steel