BEMONOC 5Meters 3M Open Ended Timing Belt Width 15mm Polyurethane Belt for Laser Engraving CNC Machines & 5pcs 24 Teeth HTD 3M Timing Pulley Bore 6.35mm 24 Teeth 3M Pulley Fit for CNC Machines,Laser Machine,Engraving Machine HTD 3M Timing Pulley Fit for High Torque and High Rotation Speed Transmission Other specifications reference picture, there are many tooth pulleys in store; If you need other size of timing pulley, pls contact us, we can customize all kinds of timing pulley! Package: 5PCS x 24 Teeth Bore 6.35mm + 10PCS x set screws + 1PCS x Allen Key+5Meters 3M Open Ended Timing Belt Width=15mm