20" 2 Stage Big Blue KDF-55 Whole House Complete Water Filter System with 4.5" diameter Sediment and GAC/KDF 55 Filters Simple in/out connection instructions allow for most homeowners to install themselves Sediment filter removes sediment & particulates, providing cleaner, clearer water GAC/KDF 55 filters out unpleasant tastes, odors, chemicals, and heavy metals. System is mounted on a white heavy duty steel bracket and includes filter housing wrench Designed for 2-4 bathrooms homes with 3-6 people