triflow ceramic filter replacement cartridge for franke frx02 daulton 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