This high-end, ready-to-work water purification system includes everything you need to produce clean, pure water on a mobile cart. Sediment/carbon pre-filtration removes particulates and harmful chlorine. The 21in. RO membrane removes at least 98% of impurities while the 21in. DI cartridge removes any remaining. The Inline TDS meter measures water after it passes through the RO and DI filters. Durable powder-coated aluminum cart. U.S.A.