Extruded Carbon Filter, 20" Standard To Remove Chlorine, Taste and Odor from Drinking Water Cartridge Dimensions: 2.5"O.D.  20"L, Fits a 20" Standard Filter Housing Excellent for use as a Prefilter or Whole House Filter 10 Micron Sediment Filtration; High Dirt-Holding Capacity AMI Model No. H-F2520AC