We (SDMP)are a professional manufacturer make all sizes precision Mould Springs. Products mainly using in plastic injection mould, metal die-casting moulds,automobile,evelator,punching machines,instruction machinary,fixture, jig and some industrial facility. Deimension we can make with outer diameter(OD) from 6 mm to 70mm, Length from 10mm to 500. Special spring can design in our house and make performance according customers’ requirement.