Case (20 ct.) Matrikx +CTO Carbon Block Filter 5 micron, RO Reverse Osmosis 9.75″ x 2.5″ Cartridge.32-250-125-975****Fits most standard 10″ RO & RO/DI Systems including KENT, CoraLife, Seachem, AquaFx, Vertex, SpectraPure.**** * 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.Case (20 ct.) Matrikx +CTO Carbon Block Filter 5 micron, RO Reverse Osmosis 9.75″ x 2.5″ Cartridge.32-250-125-975****Fits most standard 10″ RO & RO/DI Systems including KENT, CoraLife, Seachem, AquaFx, Vertex, SpectraPure.**** * 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.Product code: 5240Item No. RO-CA-CTO-C