CFS Reverse Osmosis (RO) 10" Replacement Filter Kit (Sediment, Carbon) Sediment Filter 1 micron 2.5-Inch x 9.75-Inch Carbon Block Filter 1 micron 2.5-Inch x 9.75-Inch CFS Reverse Osmosis (RO) 10" Replacement Filter Kit (Sediment, Carbon) For Kent Marine, Compatible with Seachem, Spectrapure, and all RO or RO/DI units that use standard 10" cartridges. These replacement cartridges are interchangeable with Coralife, Kent Marine, Seachem, Spectrapure, and all other RO or RO/DI units that use standard 10" cartridges.