The KX MATRIKX + Pb1 06-425-200-975 is a powerful, multifunctional water filter cartridge for residential and commercial water treatment systems. It is made of extruded activated carbon that reduces soluble lead using an ion-exchange filter medium with high specificity for soluble lead. Particulate filtration is used to intercept insoluble lead-containing particles. It also offers high levels of chemical reduction in potable drinking water, including chlorine taste and odor. The +Pb1 meets NSF/ANSI Standard 53, Turbidity and Cyst Reduction, including Cryptosporidium, Giardia, Entamoeba and Toxoplasma. Graded-density filtration combined with high dirt capacity extruded activated carbon provide several times greater life than molded filters.