20" 5 Micron Sediment Filters Polyspun To Remove Sediment From Drinking Water - 5 Micron Filtration Rating Cartridge Dimensions: 2.5"O.D.  20"L, Fits a 20" Standard Filter Housing Excellent for use as a Prefilter for a Reverse Osmosis System Graded pore structure enhances dirt-holding capacity; Free of Surfactants, Binders & Adhesives AMI Model No. H-F2005CF