1PCS HTD 8M thirteen Teeth Timing Pulley Synchronous Belt Wheel Width 27mm 32mm Bore 8/10/12/14/15mm Transmission PartsName:HTD 8M Timing Pulley Material:Aluminum alloy Width:27mm 32mm Bore:8/10/12/14/15mm Bore:Round Bore/Keyway Bore Teeth:13 Teeth