1st Stage Spun Filter; 5 micron Spun Filter can be considered as the first cleaning stages. Spun sediment filter has a structure like compressed paper. Undissolved particles, dirt, sediment, sand in the water are cleaned with this first filter. NSF (National Sanitation Foundation) approved and domestic production. 2nd Stage Granular Active Carbon Filter; Granular active carbon filter is the second stage of reverse osmosis filtration. It holds color, taste and chemical substances in water. It protects the membrane filter by cleaning chlorine and other chemical substances that should not be in quality drinking water and ensures that the reverse osmosis process is carried out flawlessly. NSF (National Sanitation Foundation) approved and domestic production. 3rd Stage Block Carbon Filter; It provides cleaning of chlorine, color, taste and odor-inducing dissolved gases, residues and organic substances that have passed through the first stage filter. This filter consists of activated carbon and is intended to purify chlorine, odor, organic pollutants, pesticides and chemicals that affect odor and taste. Nsf (National Sanitation Foundation) approved and domestic production. Stage 4 Pallas membrane filter; The original Pallas 80 gpd membrane is the most important feature of providing the best purification even in dirtier and highly conductive waters. It is the main membrane that allows the water to be purified from nano sediment, particles, heavy metals, chemicals, viruses, bacteria, microorganisms and lime by passing with the help of high pressure. Stage 5 Post carbon filter; Since the purified water in the membrane filter is close to its purity, it will come raw as consumption. Therefore, sweeteners are used to improve its taste. Nsf (National Sanitation Foundation) approved and domestic production. Set Content: 1: SPUN FILTER 2: GAC CARBON FILTER 3: CTO BLOCK CARBON FILTER 4: PALLAS 80 GPD Membrane 5: Sweetener POST CARBON FILTER. Compatible with all open case water purification systems.