Pamlico Air 20 in. W X 20 in. H X 2 in. D Fiberglass 4 MERV Air Filter is the perfect solution for maintaining clean and healthy air in your home or office. With a 4 MERV rating, this filter is designed to trap and remove dust, pollen, pet dander, and other allergens, keeping your air free from harmful particles. Made with durable fiberglass material, this filter is built to last and can easily be replaced every 3 months for optimal performance. Improve the air quality in your space with the Pamlico Air 20 in. W X 20 in. H X 2 in. D Fiberglass 4 MERV Air Filter.