Nordic Pure 20x20x1M14-6 Pleated AC Furnace Air Filter， Box of 6<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Actual Size: 19-1/2 by 19-1/2 by 3/4</li><li>Airflow (CFM) of 1968 at a Nominal Face Velocity (fpm) of 492 with a Resistance (in WG) of .39</li><li>Hypoallergenic and antimicrobial pleated electrostatic filter material</li><li>Recommended for newer units</li><li>Made in the USA</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51pXgN5ZKIL.jpg" noproxy>