The AAF Flanders EZ Flow II 25 in. W X 25 in. H X 1 in. D Fiberglass 4 MERV Air Filter is a high-quality air filter designed to improve the air quality in your home or office. With a 4 MERV rating, it effectively captures dust, pollen, and other airborne particles, making it ideal for allergy sufferers. Its durable fiberglass construction ensures long-lasting performance and easy maintenance. This 1-pack filter is a cost-effective solution to keep your indoor air clean and fresh.