Franke filter cartridges consist of a ceramic outer shell and an enclosed activated carbon block core Multi-stage filtration technology that filters out unwanted particles, letting cleaner water flow through your faucet and improving water quality Reduces Chlorine, Particulate & Turbidity, Cysts (Cryptosporidium) and Lead Certified by NSF international against NSF/ANSI Standards 42 & 53 Ceramic outer layer with an activated carbon core Multi-Stage Filtration Technology Replace every 6 months or 600 gallon For use with Franke Filtration Canister FRXSH