20x20x1 Dust/pollen Filter

Electrostatic micro particle air filter. MPR 600. Electrostatically charged ''Filtrete" fibers attract and hold particles like magnets. Captures large airborne allergens including mold spores, pollen and large dust particles. Good for high velocity equipment. Use for full three months of air quality protection under normal conditions. Meets the American Lung Association and its Health Project Indoor Air Quality Guidelines.