These stages mentioned below are a description of the 5 stages 1 The first stage cotton filter to remove dust rust and impurities 2 The second stage charcoal filter to remove any color taste or smell like chlorine 3 The third stage solid carbon filter to prevent the proliferation of fungi in the water and works as a confirmation filter on the first and second stages 4 The fourth stage the membrane filter salt processor works to adjust the salts to the natural ratio of the human body as it is characterized by the removal of salts in excess of what is required 5 The fifth stage Post Carbon filter and works to remove any taste in the water after entering the tank even if it has been stored for a long time You can install it on any home desalination device that uses the same shape as the filters in the picture All six filters are of high quality and great performance The seventh stage is an additional sterilization stage that enhances the quality of the water to become pure water suitable for drinking, cooking king and making wonderful tea and coffee tasting water for all your drinking and cooking needs. Add it to your home today for amazingly clean water! Long Lasting Filtration: Protect your home, health and appliances by filtering all of your incoming water. The 3-Stage Water Filter, filters major impurities from your water supply and provides clean water for drinking, showering, cooking, and other home uses. This system filters major water impurities like Chlorine, Rust, Dirt, Sand, Silt, Turbidity, Volatile Organic chemicals. Save your time and your money with high capacity filters,depending on incoming water quality, temperature, and incoming pressure.Save on water!