... with acid and alkali,oil liquid filter bag1 filter bagFeatures:liquid filter bag can filter normal atmospheric temperature or high-temperature ... gas mixed with acid and alkali,oil ,water.2 filter bag Material: polyester needle felt,polypropylene needle felt, ... tyoes: zinc ring,unstainless ring,or plastic ring6 Usage:filter bagwidely in metallurgy,chemical industry,building materials,smelting,pottery ...