... ISO 9001:2008 Certificate liquid filter cartridge Gas Filter Cartridge , pleated filterGood Gas Permeability. Good Resistance to Corrosion, Heat, and ... chemical corrosion resistance. It also has good air permeability, high dirt holding capacity and long-life service ... filter cartridge, with high gas permeability, large dirt holding capacity, and long service life. Gas Filter Cartridge , pleated filter ...