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COG SCREW CHROME-MOLY
12T & 13T Screw Cog
CR-MO, collar grooved, CP
15T, 16T & 18T Screw light weight Cog
CR-MO, triangle and round holes around, collar grooved, CP
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COG SCREW ALLOY
12T, 13T, 15T, 16T & 18T Anodize Black