Complete set of replacement filters for Aquaphor RO-101. Includes: K5 Polypropylene Sediment Filter Cartridge Pre Filtration 5 micron; K2 Sorption Treatment and Purification Water Filter Cartridge 3 micron; K7 Final Stage of Water Filtration and RO membrane. Aquaphor Water Filters uses high quality materials from world leading producers (e. g. BASF, John Guest, Mitsubishi, Puroliteetc.) and control the quality of our filters at every stage of production. Aquaphor undergoes annual certification according to ISO 9001 standard, and our filters are NSF and LGA certified. Despite the technological complexity, Aquaphor water filters are ergonomic and easy to use. To replace the used cartridges you do not need any special skills or tools thanks to Push and Turn Technology - Just push the button and turn the cartridge. HAZARD SAFE With technology HSS, using Aquaphor Water Filters is even more convenient and safe. Cartridges are replaced along with the casing to eliminate your contact with the accumulated contaminates. This is for the health of you and your family.