Nordic Pure 18x18x1 MERV 10 Pleated AC Furnace Air Filter, Box of 6 Actual Size of Filter: 17-1/2 x 17-1/2 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