Crystal Quest CQE-RC-04049 Fluoride Multi Filter Cartridge Crystal Quest 2-7/8-Inch By 9-3/4-Inch Flouride/Multi Filter Cartridge This Is A Synthetic Absorbent Media That Is Highly Selective For Lead, Arsenic And Fluoride The Crystal Quest 2-7/8-Inch By 9-3/4-Inch Fluoride/Multi Filter Cartridge Is Compatible