MULTI-STAGE BASIC WATER FILTER PH001 WITH TWO "MICRONETS" - filters out particles such as sand, silt and rust while allowing health-promoting minerals such as calcium and magnesium to pass through the mesh. LONG LIFE - 360 liters per filter. US MADE COCONUT SHELL ACTIVATED CHARCOAL - removes chemicals pollutants. At the same time, it improves the taste and smell of drinking water. KDF FILTER REMOVES HEAVY METALS - Lead, copper, arsenic, mercury, aluminum as well as chlorine. STONE AND SILICA BLEND OF MORE THAN 10 DIFFERENT MATERIALS including ORP Spheres, Alkaline, Tourmaline, Far Infrared Maifan Stones. Increases alkalinity (pH), decreases ORP, softens hard water for more digestibility, and adds trace elements and minerals. HIGH QUALITY ECO-FRIENDLY MATERIALS - BPA free food grade, certified by SGS, member of Water Quality Association. Save money and save the planet by replacing 8300 plastic bottles with a filter. NEW IMPROVED DESIGN - ALSO BUY OUR PH002 ULTRAFILTRATION (UF) MEMBRANE FILTER (search for B07PY5GCR2) to take your water filtration to the next level (when used in combination with PH001).