... widely used in petroleum, chemical, textile, paper and electronic industries, as well as urban residents of drinking water ... purification except iron. •Company OverviewFounded in 1997,Gongyi Filter Material Industry Co.,Ltd. is one of the ... Woodbased Activated Carbon,Anthracite Filter Media,Walnut Shell Filter,Manganese Sand Filter,Quartz Fiter Sand,Ceramic Filter Sand,Biological Particulate Filters. ...