Aqua Sanjeevni UF Membrane Filter Cartridge Set for RO Water Purifier: Advanced Filtration for Pure Water Upgrade your RO water purifier with the Aqua Sanjeevni UF Membrane Filter Cartridge Set. This high-performance Ultrafiltration (UF) membrane works in conjunction with your RO system to provide an extra layer of purification, removing even finer impurities and ensuring exceptionally clean and healthy drinking water. This pack includes one solid filter cartridge.