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 $139.14 $139.14 View... KX MATRIKX Pbi 06-450-20-GREEN Carbon Block 20" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge $25.71 $25.71 View... KX Matrikx Pb1 10" x 2.5" 0.5 Micron Carbon Block Water Filter Replacement Cartridge 06-250-125-975 $11.10 $11.10 View... KX Matrikx CTO 10" x 2.5" 5 Micron Carbon Block Water Filter Replacement Cartridge 32-250-10-GREEN $50.76 $50.76 View... KX MATRIKX CTO 32-450-10-GREEN Carbon Block 10" x 4.5" 5 Micron Whole of House Water Filter Cartridge $69.24 $69.24 View... KX MATRIKX Pbi 06-450-10-GREEN Carbon Block 10" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge $90.43 $90.43 View... KX MATRIKX CTO 32-450-20-GREEN Carbon Block 20" x 4.5" 5 Micron Whole of House Water Filter Cartridge