BlackStar H120R16 - 120 Pitch R Sprocket - 16 Tooth 2.1/16" The 12/C156 is a banded

The 12/C156 is a banded v-belt from D&D Global's Dura-Prime Band Classical - C Series line

2/A139 has a top width of 1

The Gates 20/A128 Hi-Power II PowerBand V-Belts 909220128 is a banded V-belt featuring Classical A-section dimensions

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BlackStar H120R16 - 120 Pitch R Sprocket - 16 Tooth 2.1/16" The 12/C156 is a bandedThe BlackStar H120R16 is a 120 pitch R roller chain sprocket with 16 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. Specifications Part Number H120R16 Chain Pitch 120 Number of Teeth 16 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Hardened Teeth Yes Outside Diameter 8. 44" Pitch Diameter 7. 689"