Mould spring 1.Tight tolerance. 2.OEM&ODM service. 3 ... , forging, etcMaterialAluminum, copper, brass, stainless steel, steel, iron, alloy, zinc , carbon steel, rubber and plastic .etcFinishPolishing; Anodize; SandingPowder coating; Vacuum ... Plating; Tin,Silver plating,zinc/nickel/chrome plating, hot galvanized, painting, PVC powder coating, ...