Top of the range 4-stage Reverse Osmosis Water Purification System, this unit screams quality, 1x 50 gallon per day Filmtec USA membrane, 1x 0.45 micron USA carbon filter, 1x micron sediment, 1x 5 micron USA final filter, 1x Quickflow Faucet, 1 x 3.5 gallon steel holding tank, 2x Pentek housings, 1x housing spanner, 1x drain clamp, 1x USA Payne metal shutoff valve, 1x John Guest check valve, John Guest Quick Connect fitting through out, instruction booklet and brass fittings needed for installation.