The Classic Athena UltraWater & Sediment Filter-Set consists of: 1 UltraWater Filter for Jupiter Water Ionizers and 2 Athena #1 Sediment filters. This set enables the absolute filtration of sedimena, Fluoride, chlorine, chloramines, pharmaceuticals, heavy metals, pesticides, and a plethora of other contaminants you don't want in your water, but allows the good, healthy minerals to pass through. Note: Fluoride removal is up to 90%. It is proven that our bodies need water that has good minerals dissolved in it. If you're looking for the absolute best filtration, but also concerned about sediment damaging your water ionizer, this is it! Read more about UltraWater filtration.