Bryant / Carrier Genuine OEM Fan Coil Filter (16.5x21.5x1) KFAFK0212MED (317659-402)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>MERV 4 Rated</li><li>Change Every 3 Months</li><li>16.5 x 21.5 x 1" Nominal size</li><li>OEM - Original Factory Replacement</li><li>Washable， just wash and reuse</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51zqj50ukeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51FnDrJIuHL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51MeAB0jmGL.jpg" noproxy>