Pamlico Air 18 in. W X 24 in. H X 1 in. D Fiberglass 4 MERV Air Filter is the perfect choice for clean and fresh air in your home or office. Made with high-quality fiberglass material, this filter effectively captures dust, pollen, pet dander, and other airborne particles to improve air quality. With a MERV rating of 4, it provides efficient filtration without restricting airflow. Easy to install and replace, this 1-pack filter is designed to fit perfectly in most standard air conditioning units. Breathe easy with the Pamlico Air 18 in. W X 24 in. H X 1 in. D Fiberglass 4 MERV Air Filter.