The NaturalAire Clean Essential (19 in. W X 22 in. H X 1 in. D) MERV 8 pleated air filter is third-party certified to reduce dust, pollen, dander, and lint. Its durable clay-coated frame and wire backing ensure long-lasting performance. Providing efficient filtration and improved air quality, it meets the minimum listed efficiency. Sold in a case of 12.