BlackStar 50BS18 3/4 K2S - 50 Pitch Finished Bore Sprocket - 18 Tooth - 3/4" Bore Predator Powerband Is 20/A87 the same as

Is 20/A87 the same as other brands' 20/A87

55" Outside Circumference 79

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Does 5/3V630 ship from Houston

Martin 140J45

BlackStar 50BS18 3/4 K2S - 50 Pitch Finished Bore Sprocket - 18 Tooth - 3/4" Bore Predator Powerband Is 20/A87 the same asThe BlackStar 50BS18 3 4 K2S is a 50 pitch Finished Bore roller chain sprocket with 18 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 3 4" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS18 3 4 K2S Chain Pitch 50 Number of Teeth 18 Bore Size 3 4" Minimum Bore 5 8" Maximum Bore 1 5 8" Bore Type