Nordic Pure 18x20x1 MERV 10 Pleated AC Furnace Air Filter,  Box of 12 Actual Size of Filter: 17-1/2 x 19-1/2 x 3/4 Outperforms comparable fiberglass, washable, and poly disposable filters Electrostatic air filter captures dust, pollen, dust-mite debris, mold spores, pet dander, and smog Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA