The Filtrete Air Filter 4” MPR 1550 MERV 12 comes in a convenient 2-pack, making it easy to ensure clean and healthy air in your home for an extended period of time. With a MERV rating of 12 and electrostatic filtration technology, this filter effectively captures airborne particles to improve indoor air quality. The white filter is made of durable polypropylene filter media and features a paper filter frame, providing reliable filtration for your furnace application. Ideal for maintaining a comfortable and clean home environment.