The Nano Molecular Cluster (NMC) Filter Cartridge is the most effective medium known for providing water filtration. It removes soluble heavy metals like lead, cadmium, and chromium effectively in addition to removing 99% of harmful chlorine. It has been proven to be up to 10 times more effective than its previous models in water filtration. Each Blu ISF Handheld Refill Cartridge lasts between 3-4 months (7,500-10,000 Liters). It effectively removes soluble heavy metals like lead, cadmium, and chromium in addition to removing 99% of harmful chlorine. Compatible with Ionic Shower Filter Handheld.