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.Height:9.75 inch Franke Triflow Water Filter Cartridge - Filtration down to .2 microns - Reduces fine particulate matter and turbidity - Should be replaced every 6 mos to 1 year depending on water quality and usage