... , clear crease. Even distribution, high strength, low resistance and high effi Superfine fiber filter material: Uses the Polypropylene ... strength, low resistance and high efficiency,Anti-acid-base, ant-corrosion, high melting point, stable performance,\Water-proof, high strength and can stand ... < 22> 99.5< 110H12120±5high efficient filters high effciency and low resistance air /water filter pp paper