Express Water replacement filter set includes three essential stages for high-quality water filtration. The SED 5 Micron Sediment filter is made of 100% polypropylene to remove rust, dirt, silt, and sand. The GAC 5 Micron Granular Activated Carbon filter utilizes 100% coconut shell carbon to eliminate chlorine, pesticides, and organic chemicals while improving taste and odor. Completing the set is the PAC Post Activated Carbon final stage filter, also featuring 100% coconut shell carbon to refine the taste of purified water at the end of the filtration process. All filters are brand new and sealed in original plastic wrap.