Honeywell POPUP2200， 20 x 25 x 6 inches - MERV 11 Replacement Filter for Aprilaire， Space-Gard</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Self assembly for easy installation</li><li>Highly Efficient - Rated at MERV 11 efficiency</li><li>No combs， pleat spacers or end caps</li><li>Used with SpaceGard 2200， 2120， 2250， Lennox PMAC20， GeneralAire AC-1， Aprilaire 2200 21"x 25"x 5"</li><li>Unique design offers an additional 1" of filtration depth compared to standard cartridge replacement filters.</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/51Ao6DbCVmL.jpg' noproxy></br>