Pentek NCP-20 Pleated Carbon-Impregnated Polyester Filter Cartridge, 20" x 2-1/2", 10 Microns Reduces sediment and chlorine taste and odor in residential and municipal drinking water Nominal filtration rating of 10 microns Carbon-impregnated polyester media pleated around a polypropylene core for strength and resistance to bacteria Initial pressure drop of 2 psi at a flow rate of 5 gpm Temperature range of 40 to 125 degrees F (4.4 to 51.7 degrees C)