This water filter system contains the following filter: 5 micron sediment filter, 5 micron carbon block filter, 50 gpd RO membrane, calcite carbon filter, and lastly a inline carbon filter. Also included is a 3.2 gallon storage tank, 1/4″ tubing, and fancy designer faucet at no extra charge. This alkaline RO system produces great tasting High PH water. 2 year warranty on all parts. Made in USA.