... -corrosion 3.ISO9001:2008 &2000; 4.DIN JIS plastic gear box Specifications:1) Suitable for various automotive, electronic, telecommunications, ... . 3)Quality control equipments: roundness meter, projector meter, microscope, gear-test meter, surface measuring meter and so on4) Precision/ ... made of Iron, Copper and Aluminum, and so on, with an output of over 1 million pieces per month. plastic gear box