Pentek ECP20-20BB Pleated Cellulose Polyester Filter Cartridge， 20" x 4-1/2"， 20 Microns</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Reduces sand， dirt， silt， rust， and scale particles in residential and commercial water</li><li>Nominal filtration rating of 20 microns</li><li>Resin-impregnated cellulose and polyester media pleated around a polypropylene core for strength</li><li>Initial pressure drop of less than 1 psi at a flow rate of 20 gpm</li><li>Temperature range of 40 to 125 degrees F (4.4 to 51.7 degrees C)</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/31GvdTWDCOL.jpg' noproxy></br>