uxcell Silver Tone Aluminum Alloy 12 Teeth 6mm Pilot Bore Screwed Timing Belt Pulley Product Name : Timing Pulley;Tooth Number : 12;Pitch : 5 mm / 1/5" Bore Diameter : 6 mm / 15/64";Outside Diameter : 15 mm / 0.9" Fit Belt Width : 11 mm / 0.43";Overall Size : 25 x 22 mm / 0.98" x 0.87" (D*H) Material : Aluminum Alloy;Color : Silver Tone Weight : 18g;Package Content : 1 x Timing Pulley