... 2)OEM,ODM are welcomed 3)Application:auto,toy,electronic All kinds of Spring Features 1.Material:steel,stainless steel.brass,aluminum, ... steel. 2.Surface:zinc plating ,powdered,golden etc., 3.All our products are made by high-quality steels and first ... We can make according to your design7Production euipmentproduction line of investment casting introduced from Taiwan,spectrum analyzer device imported ...