BlackStar H200A12S - 200 Pitch A-Plate Sprocket - 12 Tooth TL1215 3720-8M-20 is a timing belt

3720-8M-20 is a timing belt used on positive

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The SPA1382 has a 12

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The 3430V424 is a cogged v-belt from D&D Global's Dura-Extreme Variable Speed line

BlackStar H200A12S - 200 Pitch A-Plate Sprocket - 12 Tooth TL1215 3720-8M-20 is a timing beltThe BlackStar H200A12S is a 200 pitch A Plate roller chain sprocket with 12 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 H200A12S Chain Pitch 200 Number of Teeth 12 Bore Type Plain Bore Hub Style A Plate Strand Count Single Material Steel Hardened Teeth Yes Approx. Weight 24. 0 lbs Cross