... ODM are welcomed 3)Application:auto,toy,electronic All kinds of Spring Features 1.Material:steel,stainless steel.brass,aluminum ... We can make according to your design7Production euipmentproduction line of investment casting introduced from Taiwan,spectrum analyzer device ... Physio-chemicalLabora tory 9Production lines1) The lost-wax casting of stainless steel and heat-resisting steel with silica-gel ...