... Aluminum high strength: big density Cast & ForgedWe can produce gears, gear boxes, worm, worm wheel, etc.We Shenzhen HuaYueXin Precise ware Co ... and stainless steel as raw materials which are as following:gear wheel,worm wheel,worm, metals injection shaping; B. Plastics ... ,nylon,determine as raw materials.The products concerning as plastic gear wheel,worm wheel and other precise injection plastics; C. ...