Pamlico Air 18 in. W X 18 in. H X 2 in. D Fiberglass 4 MERV Air Filter is the perfect solution for improving your indoor air quality. Designed to fit most standard HVAC systems, this air filter effectively captures dust, pollen, and other airborne particles with its 4 MERV rating. Made of durable fiberglass material, it is built to last and can be easily replaced when needed. Improve the air you breathe with Pamlico Air.