259112-103 Trion Air Bear Supreme 20x20x5 Media Filter MERV 11 Rated-4 Pack Air Bear filters capture and hold pollutants inside the filter, allowing air to flow freely through the system Highly-efficient, 100% electrostatically-charged synthetic material. Features extended surface pleats that have a higher dirt-holding capacity than competitive filters. Quick-and-Easy installation MERV 11 Rated Made in the USA