... with 4.0G plastic tank (RO,ro purifier,reverse osmosis) Features:Stage 1: 5micron PPF Cartridge which filter sand, mud, rust, sediment, ... etc in water.Stage 2: Granular Activated Carbon Cartridge which removes bad smell and filter organic sediment, chlorine etc ... then prevent from second-hand pollution. (RO,ro purifier,reverse osmosis) American type purifier with manual flush(RO,ro purifier ...