The filter media could be selected between domestic or imported nonwoven fabric with laminated polyester (with oil resistant, waterproof, antistatic or fire resistant options available), polyester long fibered filter paper, fiber glass media etc. With the international advanced wide folding technology, the space is evenly distributed, the element features in acid and alkali resistant, corrosion resistant, high anti bursting performance, large filtration area, oil resistant and water proof, high filtration efficiency, high air volume, high strength, high tensile, wear resistant, high filtration precision, low operation resistance pressure, low friction factor, not adhesive to dust, good damp-proof and moisture-proof characteristics, allow repeated water wash, enhancing the quantity and quality of dust type material.