The Pamlico Air 18 in. W X 20 in. H X 1 in. D Fiberglass 4 MERV Air Filter is an essential tool for keeping the air in your home clean and fresh. Made of durable fiberglass material, this filter effectively captures dust, pollen, and other airborne particles with its 4 MERV rating. Measuring 18 inches wide, 20 inches high, and 1 inch deep, it is compatible with most HVAC systems and comes in a convenient 1-pack for easy replacement. Keep your indoor air quality at its best with the Pamlico Air Air Filter.