Ultimate 4 Cartridge Refill

4 Powerful Filters 6 Stages Fluoride, Chloramines, Chlorine, Iron, Copper & More.

KDF & acid-washed coconut shell GAC Plus Fluoride, Carbon and Chloramine Filters.

Filter cartridge Certified to NSF/ANSI Standard 42 and NSF/ANSI Standard 61 for material requirement(s) only.
Filter Cartridge Certified to NSF/ANSI Standard 372 for low lead compliance.