Watts Premier 560087 PH Balancing Ceramic 11-Inch Filter with 3/8-Inch QC Fitting PH BALANCING FILTER: The Watts Premier pH Balancing Ceramic Filter is specifically designed to function a post filter for you RO system. This multi-layer filter will add minerals back in to your RO treated water as well as provide pH balance of the water as needed. DIFFERENT LAYER FILTER: The six layers include a sediment filter, mineral filter, the pH balancing alkalization ceramic media, activated ceramic phase, coral media and final sediment filter. CERAMIC FILTER: It has filter re-mineralizes, pH balance, proper alkalization, far-infrared activation and balanced mineral elution of RO water. CERAMIC FILTER DIMENSION: PH balancing ceramic filter is of opening size 16.4 x 6.4 x 4.9 inches and it is available in different size  9-inch and 11-inch. FILTER WITH 3/8-inch QC FITTING: It is intended for use as a re-mineralization post filter for all reverse osmosis systems on the market. The kit Contains one 11-Inch pH balancing ceramic filter and two 3/8-Inch easy to install quick connect fittings. It is 12 month filter.