Features of Magnetite Iron Ore Filter Media: 1.High mechanical strength and low wear rate. 2.High efficiency in removing iron,manganese and fluorine 3.Magnetite iron ore is necessary filter media in three layer filter Major parameters: Fe2+:23.85% Fe3+: 40-42% Fe304: 4.45% Porosity: 47% Breaking rate: 0.45% Advantages of Gongyi Xianke Water Supply Material Co.Ltd.: We are the manufacturer of chemical auxiliary agent, activated carbon and filter materials in China. First founded in 1982 as Activated Carbon Cooperation of Gongyi. We provide products that met ISO9001:2008 and services of superior quality and value that improve the global environment and the lives of common people. Please click here http://www.activatedcarbonxk.com/ if you are intrested in my company products, or contact me by MSN: [email protected] Sincerely hope to cooperate with you !