The 5 stages water filter from Aqua Trex  is manufactured in Taiwan and assembled in Egypt from high quality materials free of lead and cadmium. It is the best solution to drink a safe and pure water without dust, rust ,sand, insects, chlorine and gases, this filter also adjusts the water PH .5 stages of filtration as following :Sediment: Primary cartridge composed of polypropylene fibers at 5 microns precision to prevent impurities, sand, insects, algae and rust.GAC: Contains granular activated carbon which adsorbs gases that cause bad odor in water, chlorine and organic substances.CTO : Composed of carbon block to adsorb chlorine derivatives and organic substances, encapsulated in unwoven fabric at 5 microns precision to ensure the absence of impurities.Post Carbon: Contains active carbon from coconut shell to improve water's taste and adsorb gases and odors.PH: Adjust the PH to remove the bitterness of the water phase and a useful addition salts for water such as calcium, magnesium and potassium.