3M COMPANY 9803-6 9803DC-6 Filtrate Filter, White Filter measures 20x 25 x 1 Effectively reduces allergens and microscopic particles in your home's air Attracts and captures large airborne allergens like pollen, mold spores and dust mites; and attracts and captures microscopic airborne particles like smoke, pet dander, household dust and Smog Uses electrostatically charged media to not only filter particles in the air but attract them Meets the strict standards of American lung association's Health house project