BlackStar H80BS21 2 3/16 K2S - 80 Pitch Finished Bore Sprocket - 21 Tooth - 2-3/16" Bore CX Section so a 2/B104 from any

so a 2/B104 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

The Gates 765L6 Micro-V Belts is a Micro-V (multi-ribbed) belt with Micro-V L-section dimensions

"name":"Gates AT5-660-20 Synchro-Power Polyurethane Belts"

16/B137 has a top width of 11

"sku":"TB037256184932"

BlackStar H80BS21 2 3/16 K2S - 80 Pitch Finished Bore Sprocket - 21 Tooth - 2-3/16" Bore CX Section so a 2/B104 from anyThe BlackStar H80BS21 2 3 16 K2S is a 80 pitch Finished Bore roller chain sprocket with 21 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. This sprocket has a 2 3 16" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H80BS21 2 3 16 K2S Chain Pitch 80 Number of Teeth 21