... 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.Stage 3: Block Activated Carbon Cartridge which complete ... hand pollution. (RO,ro purifier without pump,reverse osmosis) RO style without pump sediment filters(RO,ro purifier without pump)