By metal mesh and aluminum,copper,nickel or stainless steel sheet metal stamping combination of cold sheet filter elements.Metal mesh is strictly according to GB5330-85 standard to organize production.Pore size filters according to network and the filter is divided into skeleton,skeleton network has a certain rigidity,strength and impact toughness.Filter element made of metal mesh filter film,high strength,Tung oil capacity,to ensure the filtering precision,easy to clean.