... ,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 in water. ... prevent from second-hand pollution. (RO,ro purifier,reverse osmosis) American type purifier with manual flush(RO,ro purifier ...