Pamlico Air 20 in. W X 36 in. H X 1 in. D Fiberglass 4 MERV Air Filter is the perfect addition to your home's air filtration system. This high-quality air filter is made from durable fiberglass material and has a 4 MERV rating, ensuring that it effectively captures dust, pollen, and other airborne particles. With a convenient size of 20 in. W X 36 in. H X 1 in. D, it is easy to install and fits most standard air systems. Keep your indoor air clean and fresh with the Pamlico Air 20 in. W X 36 in. H X 1 in. D Fiberglass 4 MERV Air Filter.