BlackStar D50P18H - Double Strand 50 Pitch Taper Lock Sprocket - 18 ToothThe BlackStar D50P18H is a 50 pitch double strand Taper Lock 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 requires a Taper Lock Bushing (sold separately). Specifications Part Number D50P18H Chain Pitch 50 Number of Teeth 18 Bore Type QD Hub Style Taper Lock Bushing Required Taper Lock Bushing Strand Count Double Material