This high quality inline water filter is designed to provide crystal clear great tasting drinking water. The openings on this filter are 1/4" FPT standard threads and will fit any 1/4" male pipe thread fittings. It utilizes NSF listed 20x50 mesh Coconutshell granular activated carbon which is acid washed to remove any impurities prior to use in this product. This filter also contains 12 oz. of KDF55 catalytic media. This filter has been tested to 17,500 gallons of preformance for taste and odor. This testing assures you the customer that you are receiving the highest quality product available and in testing it has passed various ANSI/NSF Standard structural tests which insure that this filter meets the rigorous requirements set within the standard to help insure that this filter will remain leak free. Compare this filter to similar products sold under brand at your local big-box retailer for many times the price. These filters are great for use behind your refrigerator, and for use with small automatic coffee making equipment and ice machines.