The Aerostar 20x25x1 Slim MERV 8 Furnace Air Filter by Canopy comes in a convenient 6 pack, making it easy to ensure clean and healthy air in your home for an extended period of time. With an actual size of 19 1/2" x 24 1/2" x 3/4 ", this filter is designed to fit snugly in your furnace or air conditioner, providing efficient filtration. The MERV 8 rating indicates its effectiveness in capturing airborne particles, while the electrostatic filter technology enhances its capabilities. Made in the United States with synthetic filter media, this filter is a reliable choice for maintaining indoor air quality for up to 3 months.