The Omnipure K5555-BB DI Mixed Bed 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 uses the technology of ion exchange to purify water. The cartridge removes the taste and odor of chlorine, acid neutralizer, dust, hydrogen sulfur, dirt, and sediment. It is rated to a 0.5 gpm. The dimensions are 2.5 x 10 inches. 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.