The Nano Molecular Cluster (NMC) Filter Cartridge is the most effective medium known to water filtration today.It effectively removes soluble heavy metals like lead, cadmium, and chromium in addition to removing 99% of harmful chlorine.It has been proven to be up to 10 times more effective than its predecessor, KDF55, in water filtration.These cartridges are intended for use only with the Ionic Shower Filter Handheld.These cartridges help to effectively remove harmful pollutants. For Ionic Shower Filter Handheld