The six layers include a sediment filter, mineral filter, pH balancing alkalization through ceramic media, ceramic phase for ray release and activation of water, coral media for proper pH balancing and a final sediment filter * Filter re-mineralizes, pH balance, proper alkalization, far-infrared activation and balanced mineral elution of RO water * Intended for use as a re-mineralization post filter for all reverse osmosis systems on the market * Kit contains one 13-Inch pH balancing ceramic filter and two 1/4-Inch easy to install quick connect fittings * 12 month filter