BlackStar DS50ATL21H - Double-Single 50 Pitch Taper Lock Sprocket - 21 Tooth Bearing The 7/C270 has a 7/8"

The 7/C270 has a 7/8" width

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BlackStar DS50ATL21H - Double-Single 50 Pitch Taper Lock Sprocket - 21 Tooth Bearing The 7/C270 has a 7/8"The BlackStar DS50ATL21H is a 50 pitch double single strand Taper Lock roller chain sprocket with 21 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 DS50ATL21H Chain Pitch 50 Number of Teeth 21 Bore Type Plain Bore Hub Style Taper Lock Bushing Required Taper Lock Bushing Strand Count