Uxcell Timing Pulley, Silver Tone Product name : timing PULLEY; material : aluminum; color : Silver tone Number of tooth : 48t; pitch : 5.08Mm/1/5" Bore diameter : 10Mm; top diameter : 55Mm/2.2" Overall size : 80 x 25Mm/3.1" x 1 inch (d*h); fit belt width : 10.5Mm/0.41" Weight : 291G; Package Content : 1 x timing PULLEY