Waterdrop WD-D6RF Filter, Replacement for WD-D6-B Reverse Osmosis System, 1-year Lifetime Material PP cotton, Activated Carbon Block, Reverse Osmosis Membrane Product Dimensions 5 in.D x 6 in. W x 14 in. H. Item Weight 5.5 lbs. Eternal Testing Certification ANSI, NSF Product Benefits Uses advanced filtration technology to reduce most contaminants, including salt, atrazine, nitrates, PFAS, lead, sodium, chromium, etc. with 2 coconut carbon block layers to reduce chlorine, taste and odor and 2 PP cotton layers to intercept sediment and other large particles, improving the taste of water. Premium. Material: Waterdrop filter uses select filter media and has been through rigorous tests so that these 6 layers of filters can work as 1 to filter every drop of water. With a pore size of 0.0001μm, the huge DOW RO membrane can reduce most heavy metals and other impurities to prevent clogs. The carbon block, made from Sri Lankan coconut shell, is 100% organic and pure, please confirm whether you are allergic to coconut.