Undercounter reverse osmosis system, 5 stages with tank and faucet. It has 2 pre-filters (polypropylene 1 μm, coconut shell activated carbon), reverse osmosis membrane 50gpd, water taste and odor improvement filter and enrichment filter. Removes rust, sand, soil, pesticides, 99% chlorine and organic compounds. The reverse osmosis membrane removes contaminants that may be present in your water such as lead, barium, chromium, mercury, sodium, cadmium, fluoride, nitrite, nitrate and selenium.