KX Technologies - 32-450-20-MATRIKX - 20" x 4.5" MatriKX CTO - 5 Micron - Chlorine/Chloramine Taste and Odor FilterKX Technologies 20" x 4. 5" MatriKX CTO Carbon Block Filter 5 micron dual action filtration for chlorine and chloramine removal in whole house and commercial systems NSF Certified Coconut Shell Carbon 20" Big Blue WHY IT WORKS Dual action carbon block technology tackles both sediment and chemical contaminants Dual Contaminant Reduction Removes both chlorine and chloramine taste and odor in a single filter stage, unlike standard carbon that only