... to you Specifications1.Material: aluminium, copper, stainless steel, carbon steel2.Cold forming; machine manufacturing3.Sizes: all sizes M2 - M1004. ... the highest qualitylet me introduce our factory brieflyQingdao Aoerxin Machine Manufacturing Co. Ltd. is a high-tech ... company specializing in the production of various ( material: stainless steel, copper, iron, aluminum, plastic etc ) standard parts and ...