Franke Filter cartridges consist of a ceramic outer shell and a closed activated carbon block core Multi-stage filtration technology filters out unwanted particles, allowing cleaner water to flow through your faucet and improving water quality Reduces chlorine, particles and turbidity, cysts (cryptosporidium) and lead Certified by NSF International to NSF/ANSI Standards 42 and 53 Ceramic outer layer with activated carbon core. Height 9.75" Franke FRX-02 Triflow Water Filter Cartridge (Pack of 2)