Nordic Pure 20x24x4M13-1 20x24x4 MERV 13 Pleated AC Furnace Air Filter， Box of 1， 4-Inch</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Actual Size: 19 3/8 x 23 3/8 x 3 5/8</li><li>Comparable to a MPR rating of 2200</li><li>Superior Air Filter for Residential or Commercial Property</li><li>Hypoallergenic and antimicrobial pleated electrostatic filter material</li><li>Made in the USA</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/513cWFlRIQL.jpg' noproxy></br>