Keep your indoor air quality at its best with Pamlico Air 12 in. W X 36 in. H X 1 in. D Fiberglass 4 MERV Air Filter. Made with durable fiberglass material, it effectively captures dust, pollen, and other airborne particles, leaving you with clean and fresh air to breathe. With a MERV rating of 4, this filter is designed to trap even the tiniest particles, ensuring a healthier and more comfortable living environment. Its compact size and easy installation make it a must-have for any home or office. Upgrade your air filtration system today with the Pamlico Air 12 in. W X 36 in. H X 1 in. D Fiberglass 4 MERV Air Filter.