Designed to fit conveniently under most kitchen sinks. Installs quickly and easily on 3/8 in cold water line to provide cleaner, fresher-tasting drinking and cooking water by reducing sediment, unpleasant tastes, odors, chlorine, and other impurities (5 nominal micron rating). Includes quick-connect fittings and installation hardware, filter housing, and No.D-20 granular activated carbon filter cartridge with 5 nominal micron rating and up to 3-month/250-gallon life. Uses Nos.D-10, D-20, D-30, or D-40 filter cartridges, No.OR233 replacement o-ring, No.FT-10 lead-free faucet, and No.SW-5 filter housing wrench, all sold separately. NSF International tested and certified.