Aries - AF-10-2054 - 10" x 2.5" ALL 4 lb. KDF-55 Cartridge FilterAries Filter Works AF 10 2054 All KDF 55 Cartridge Filter 10" x 2. 5" high capacity redox media cartridge for heavy metal reduction and chlorine removal 4 lbs KDF 55 Heavy Metal Reduction Chloramine Removal Standard 10" Housing The Aries AF 10 2054 is a solid KDF 55 filter cartridge designed for point of entry or reverse osmosis pre filtration applications where heavy metal reduction and oxidation control are priorities. With a full 4 pounds of KDF 55