An alkaline inline filter that is 2.5 inch in outside diameter and 12" in length with 1/4? FNPT ports. This Hydronix filter has a capacity of 2,000 gallons and a maximum flow rate of 0.5 gpm. The weight of the filter is 1 lb 13 oz. By adding this inline filter and connecting the tubes so that water flows into it before going to the faucet, you get the optimum benefit of the alkaline-mineral-ORP media. With this addition, water produced by your existing reverse osmosis system gets added alkaline and antioxidant qualities. The filter re-mineralizes and raises the pH of your purified water by at least 1 to 2 points. The media in this filter lowers the ORP of water. The alkaline filter has the following media: D300 Alkalizing Bio Tablets, D600 anti-oxidant mineral spheres, bio ceramic alkalizer, ORP mineral stone and mineral stones, in addition to pads at entrance and exit of the filter. The purchase of this filter does NOT include the quick connect fitting kit 2AME0404 (ASIN: B00H9