ZeroWater Replacement Filter for Pitchers 12-Pack ZR-012: Not an ordinary water filter ZeroWater filter delivers unique 5-stage ion exchange technology Produces the purest tasting water Removes 99.6% of TDS (total dissolved solids) from your tap water Removes aluminum, zinc, nitrate, fluoride and more Only water filter that meets FDA standards for TDS in purified bottled wate Pour-through, gravity fed filter Certified by the NSF to reduce lead and other heavy metals such as chromium 3 and 6 Fits All ZeroWater pitchers and dispensers Water filters for pitchers come in a 12-pack Coarse filter to remove fine particles and sediment Distributor that maximizes contact time Multi-layer system using activated carbon and oxidation reduction alloy Comprehensive ion exchange array Non-woven membrane to remove fine particles Enjoy pure-tasting water when you use the ZeroWater Replacement Filter for Pitchers 12-Pack ZR-012. It combines five sophisticated technologies that work together to remove virtually all dissolved solids from your tap water. The first layer of filtration, activated carbon and oxidation reduction alloy, removes the chlorine taste. The ion exchange stage removes virtually all dissolved solids that may be left. Three additional stages are included to remove other impurities. The water filter for pitchers is certified by the NSF to reduce lead and other heavy metals such as chromium 3 and 6. It comes in a pack of 12.