Pentek EP-20BB Carbon Block Filter Cartridge, 20" x 4-5/8", 5 Microns none Imported Reduces fine sediment and chlorine taste and odor in residential and commercial drinking water Nominal filtration rating of 5 microns Bonded PAC media with polyolefin pre-filter and polyethylene netting for extended life Initial pressure drop of 5.5 psi at a flow rate of 5 gpm Temperature range of 40 to 180 degrees F (4.4 to 82.2 degrees C)