BlackStar 50BS37 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 37 Tooth - 1-3/8" Bore Medium-Duty 4-Bolt Flange Block 2/BK195 is a banded v-belt

2/BK195 is a banded v-belt used on industrial drives - fans and blowers

com/s/files/1/0666/7721/products/3M_5M_8M_14M_HTD_Timing_Belt_cec51b20-0773-4008-a94a-9cb912c3f872

so a 16/B99 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

"name":"Continental 64G-14M-90-3535 TL SPROCKET"

Continental 5V1900

BlackStar 50BS37 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 37 Tooth - 1-3/8" Bore Medium-Duty 4-Bolt Flange Block 2/BK195 is a banded v-beltThe BlackStar 50BS37 1 3 8 K2S is a 50 pitch Finished Bore roller chain sprocket with 37 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 3 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS37 1 3 8 K2S Chain Pitch 50 Number of Teeth 37 Bore Size 1 3 8" Minimum Bore 3 4" Maximum Bore 1 15 16"