uxcell Aluminum Alloy XL Type 50 Teeth 8mm Pilot Bore Timing Pulley Product Name : Timing Pulley;Type : XL;Tooth Number : 50 Pitch : 5.08 mm / 1/5";Bore Diameter : 8 mm / 5/16";Fit Belt Width : 11 mm / 0.433" Fit for Hole Diameter : 60mm / 2.4";Overall Size : 85 x 25 mm / 3.35" x 0.98" (D*H) Material : Aluminum Alloy;Color : Silver Tone Weight : 296g;Package Content : 1 x Timing Pulley