The Omnipure K5621-BB Carbon Block Filter is an inline type of 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. The cartridge removes the taste and odor of chlorine, dirt, rust, sand, and sediment. It is rated to a 0.5 gpm. The dimensions are 2.5 x 12 inches. It has a rating of 10 microns. The cartridge has a quick connect 1/4 inch FPT fittings for easy installation. It is one of the best water filtration cartridges for icemakers, RO systems, beverage systems, and refrigerators. The cartridge has a capacity of 1 year or 3000 gallons.