30-micron polypropylene pre-filter removes sediment, rust and other microscopic debris 20 micron Pentek GAC-5 granular activated carbon filter cartridge filters chlorine taste and odor. 5-micron solid activated carbon block cartridge remove chlorine, chloramine, bad tastes and odors, pesticides and carcinogenic impurities Encapsulated TFC reverse osmosis membrane removes up to 99% of water contaminants like lead, nitrate, fluoride and mercury, even in high TDS water Encapsulated RO membrane system makes change-out quick and easy NSF-certified lead-free faucet Granular activated in-line post-filter polishes the water to crystal clear perfection Constructed with FDA and NSF certified materials Easy to install kit includes water storage tank and pure water dispensing faucet Manufactured and tested in the USA