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 $124.83 $124.83 View... KX MATRIKX Pbi 06-450-20-GREEN Carbon Block 20" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge $43.67 $43.67 View... KX MATRIKX CTO 32-450-10-GREEN Carbon Block 10" x 4.5" 5 Micron Whole of House Water Filter Cartridge $23.07 $23.07 View... KX Matrikx Pb1 10" x 2.5" 0.5 Micron Carbon Block Water Filter Replacement Cartridge 06-250-125-975 $81.13 $81.13 View... KX MATRIKX CTO 32-450-20-GREEN Carbon Block 20" x 4.5" 5 Micron Whole of House Water Filter Cartridge $9.96 $9.96 View... KX Matrikx CTO 10" x 2.5" 5 Micron Carbon Block Water Filter Replacement Cartridge 32-250-10-GREEN $62.12 $62.12 View... KX MATRIKX Pbi 06-450-10-GREEN Carbon Block 10" x 4.5" 0.5 Micron Whole of House Water Filter Cartridge