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
Info:Martin 140F25H Type B Single Strand Welded Bushed Roller Chain Sprocket With Hardened Teeth, 1 to 4 in Dia Bore, 14.903 in OD, #140 Chain, 25 Teeth, 1-3/4 in Pitch, Steel