Nordic Pure 18x24x1M8-12 MERV 8 Pleated AC Furnace Air Filter, 18x24x1, Box of 12 Actual Size of Filter: 17-3/8 x 23-3/8 x 3/4 Electrostatic filter captures large airborne particles like household dust, mold spores, and pollen Outperforms comparable fiberglass, washable and disposable filters Hypoallergenic and antimicrobial pleated electrostatical filter material Made in the USA