36mm Outside Dia 11mm Belt Width 6mm Bore 20 Teeth Synchronous Timing Pulley Product Name : Timing Pulley;Type : XL20;Number of Tooth : 20 Pitch : 1.6mm/1/16'';Top Diameter : 27mm/1.06";Overall Size : 36 x 25mm/1.4'' x1''(D*H) Bore Diameter : 6mm/ 15/64";Fit Belt Width : 11mm/0.43'' Material : Aluminum;Color : Silver Tone Weight : 52g;Package Content : 1 x Timing Pulley