Worm and Worm Gear, Timing Pulley, Gear Shaft manufacturer / supplier in China, offering Customized Carbon Steel Spur Helical Spiral Gear Pinion with Weight Reduction Hole, Factory Customized Carbon Steel High Precision Spur Helical Spiral Gear Pinion with SGS, 6063 Hard Oxide Aluminum Alloy Timing Pulley Synchronous Pulley for Industrial Equipment and so on.