KX Matrikx 06-250-125-975 Lead, Cyst, Chlorine Taste and Odor Reduction Filter, 10-Inch nsf coconut shell activated carbon Made in US MATRIKX Pb1 is a powerful, multifunctional filter cartridge for residential and commercial water treatment systems 0.5 m Nominal Filtration Color coded molded one-piece gasket and end cap Manufactured using FDA-compliant materials NSF/ANSI Standard 42 and WQA Gold Seal certified