Pamlico Air 12 in. W X 20 in. H X 2 in. D Fiberglass 4 MERV Air Filter is the ultimate solution for cleaner and fresher air in your home. This high-quality air filter features a 4 MERV rating, ensuring that it captures even the smallest particles and allergens in the air. With its durable fiberglass construction, it is built to last and can be easily replaced when needed. Keep your indoor air quality at its best with the Pamlico Air 12 in. W X 20 in. H X 2 in. D Fiberglass 4 MERV Air Filter.