Heavy duty 20"x4.5" water filter cartridge for high-flow applications. This filter will remove hundreds of contaminants from water. Multi-stage 20" filter that consists of one micron filter pad, KDF55, KDF85, Granular Activated Carbon (GAC), and another 1-micron pad. This filter will remove hundreds of contaminants from water . Significantly extend the life of granular activated carbon while protecting the carbon bed against fouling by bacterial growth. Effectively remove chlorine and heavy metals and control microorganisms. Removes or reduces from municipal or other water supplies such as unpleasant odors , Chlorine , Chloramines , Lead ,Mercury, Iron, Hydrogen sulfide.