BlackStar D100S45 - Double Strand 100 Pitch Split Taper Sprocket - 45 ToothThe BlackStar D100S45 is a 100 pitch double strand Split Taper roller chain sprocket with 45 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a Split Taper Bushing (sold separately). Specifications Part Number D100S45 Chain Pitch 100 Number of Teeth 45 Bore Type Plain Bore Hub Style Split Taper Bushing Required Split Taper Bushing Strand Count Double