Info:Martin 140S45 Type 5 Single Strand Welded Bushed Roller Chain Sprocket With Lightening Hole, 1.688 to 4.25 in Dia Bore, 26.076 in OD, #140 Chain, 45 Teeth, 1-3/4 in Pitch, Steel
Info:Martin Saber Tooth® 140SF12H QD Bushed Type B Single Pitch Roller Chain Sprocket With Hardened Teeth, 7.581 in OD, #140 Chain, 12 Teeth, 1-3/4 in Pitch, Steel