Gross 20 replacement filter for cold water purification in the entire home. Its unique structure and design allow the module to remove sediments, chlorine, heavy metals and other impurities from the water. Replacement filter for the Gross 20” in-line system which provides whole-house cold water purification. Due to its advanced technological solutions (CarbFiber block) and design this cartridge effectively protects against suspended particles, chlorine, heavy metals, organic compounds and other contaminants down to 0.5 micron in size. Thanks to increased contents of the selective ion-exchange fibrous material Aqualen™, this cartridge exhibits increased dirt-retention capacity while effectively removing dissolved and colloidal iron. Contains silver in its active ionic form.