Type: K variety timing pulley 15T/16T-3M-6/10/15mm Pitch: 3mmTeeth Number : 15T/16TteethBore: 4/5/6/6.35/7/8mmFlange: DoubleMaterial: 6061 Aluminium AlloyFixed mode: 2* M4Fit for Belt Wide: 6/10/15mmIf you like different units of wheels or belts, please contact me!