Gear, Rack, Sprocket manufacturer / supplier in China, offering Source Factory M4 40X40 Straight Teeth Gear Rack for Spur Gear, Factory Direct 1.5m 2m Precision Helical Gear Rack Pinion for CNC Machine, European Standard OEM 1.25m 1.5m 2m 3m Helical Gear Rack and Pinion and so on.