3M Filtrete Room Air Conditioner Filter

Electrostatically charged Filtrete fibers work like magnets to attract airborne particles down to as small as 3 microns including dust, pollen, mold, pet dander, and smoke. 50 times more efficient than ordinary foam room air conditioner filters. 2 months performance under normal conditions. Easy-to-install. Designed for use with room air conditioners. 15" x 24" x 1/4".