****Fits most standard 10" RO & RO/DI Systems including KENT, CoraLife, Seachem, AquaFx, Vertex, SpectraPure.****Matrikx +CTO/2 Carbon Block Filter 5 micron, RO Reverse Osmosis 10" Cartridge. * 5 micron, nominal filtration * High absorptive capacity and efficiency * Efficient Sediment Filter * No release of carbon fines This carbon filter is used for the removal of chlorine and other VOC's from water.