The Omnipure K5520-JJ 1 Mic. Carbon Block is an inline type of phosphate cartridge. An inline cartridge can be installed inline, even behind a refrigerator, for ensuring cleaner, better tasting water. The advantage of inline filters is that they can be easily installed wherever filtered water is required. It has a rating of 1 micron. The cartridge removes the taste and odor of chlorine, dust, lead, cysts, dirt, sand, rust, and sediment. It has a flow rate of 0.5 gpm. The dimensions are 2.5 x 10 inches. The cartridge has a quick connect 1/4 inch FQC fittings for easy installation. It is one of the best water filtration cartridges for icemakers, RO systems, beverage systems, and refrigerators. It has a capacity of 1 year or 1000 gallons.