Nordic Pure 20x20x5L2M14-2 Lennox X7935 Replacement Air Filter, Box of 2 Actual Size: 19-5/8x 19-7/8 by 4-3/88 Airflow (CFM) of 1968 at a Nominal Face Velocity (fpm) of 492 with a Resistance (in WG) of .39 Hypoallergenic and antimicrobial pleated electrostatic filter material Recommended for newer units Made in the USA