Keep your indoor air clean and free of harmful particles with AAF Flanders EZ Flow II 18 in. W X 30 in. H X 1 in. D Fiberglass 4 MERV Air Filter. Made of durable fiberglass material, this filter has a MERV 4 rating, ensuring effective filtration of dust, pollen, and other allergens. Its compact size makes it perfect for use in any standard HVAC system. Say goodbye to poor air quality and breathe easy with the AAF Flanders EZ Flow II air filter.