Designed to fit conveniently under most kitchen sinks. Installs quickly and easily on 3/8 inch 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.