Nordic Pure 20x25x4 (3-5/8 Actual Depth) MERV 8 Pleated AC Furnace Air Filter, Box of 6 Actual Size of Air Filter:19 1/2x24 1/2x3 5/8 Captures large airborne particles like household dust, mold spores, and pollen Outperforms comparable fiberglass, washable, and poly disposable filters Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA