EFFECTIVE MEMBRANE FILTRATION – The TFC Membrane Filter works to remove harmful contaminants that may be present in your water down to 1/10,0000 of a micron. REMOVES TDS IN WATER – When water passes through the RO membrane, it removes up to 98 percent of the Total Dissolved Solids (TDS) in water. The remaining TDS can be removed with a mixed bed resin. SUITABLE FOR MOST RO/RODI UNITS – The 11-3/4" standard size replacement membrane filter fits most reverse osmosis water filtration systems, RO Buddie, AquaticLife Classic RO/DI and RO/RODI units in the market. LONG LIFE – The high-quality materials used in this reverse osmosis water filter membrane ensure a long two-year life depending on supply water quality. It’s spiral-wound and tape wrapped for durability. UNSURPASSED QUALITY AND SATISFACTION – AquaticLife manufactures an assortment of water filtration equipment. Every product that goes out the door meets our highest quality and standards.