BlackStar 50BS20 1 K2S - 50 Pitch Finished Bore Sprocket - 20 Tooth - 1" Bore QD-E "mpn":"TB072053757941"

"mpn":"TB072053757941"

so the BB158N interchanges with Gates BB158N

"mpn":"100T5/800US-D&D"

Is 8/B51 interchangeable with Gates 8/B51

12/C300 has a top width of 11

BlackStar 50BS20 1 K2S - 50 Pitch Finished Bore Sprocket - 20 Tooth - 1" Bore QD-E "mpn":"TB072053757941"The BlackStar 50BS20 1 K2S is a 50 pitch Finished Bore roller chain sprocket with 20 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS20 1 K2S Chain Pitch 50 Number of Teeth 20 Bore Size 1" Minimum Bore 3 4" Maximum Bore 1 5 8" Bore Type Finished