KX Matrikx Sort By Default Title - A to Z Title - Z to A Price - lowest first Price - highest first Time Added - latest first Popularity - most popular first Sales - best selling first $144.01 $144.01 View... KX MATRIKX Pbi 06-450-20-GREEN Carbon Block 20" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge $26.61 $26.61 View... KX Matrikx Pb1 10" x 2.5" 0.5 Micron Carbon Block Water Filter Replacement Cartridge 06-250-125-975 $11.49 $11.49 View... KX Matrikx CTO 10" x 2.5" 5 Micron Carbon Block Water Filter Replacement Cartridge 32-250-10-GREEN $93.60 $93.60 View... KX MATRIKX CTO 32-450-20-GREEN Carbon Block 20" x 4.5" 5 Micron Whole of House Water Filter Cartridge $52.54 $52.54 View... KX MATRIKX CTO 32-450-10-GREEN Carbon Block 10" x 4.5" 5 Micron Whole of House Water Filter Cartridge $71.66 $71.66 View... KX MATRIKX Pbi 06-450-10-GREEN Carbon Block 10" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge