uxcell Aluminum Alloy XL Type 40 Teeth 8mm Pilot Bore Screwed Timing Belt Pulley Product Name : Timing Pulley;Type : XL;Tooth Number : 40 Pitch : 5.08 mm / 1/5";Bore Diameter : 8 mm / 5/16";Outside Diameter : 48 mm / 1.89" Fit Belt Width : 11 mm / 0.43";Overall Size : 70 x 25 mm / 2.75" x 0.98" (D*H) Material : Aluminum Alloy;Color : Silver Tone Weight : 200g;Package Content : 1 x Timing Pulley