BlackStar D140A54 3 15/16 PB - Double Strand 140 Pitch A-Plate Sprocket - 54 Tooth - 3" BoreThe BlackStar D140A54 3 15 16 PB is a 140 pitch double strand A Plate roller chain sprocket with 54 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 3" bore and is ready for immediate installation. Specifications Part Number D140A54 3 15 16 PB Chain Pitch 140 Number of Teeth 54 Bore Size 3" Bore Type Plain Bore Hub Style A Plate Strand Count Double