This 12-pack of air filters from Koch is designed to improve your indoor air quality. With a MERV 8 rating, it effectively captures particles such as dust, pollen, and pet dander. The pleated design provides a larger surface area for filtration, while the white color complements any indoor décor. Each filter measures 21 1/2\" x 23 1/2\" x 1\" and fits most standard air filter systems. Made by Aerostar, a trusted brand in the industry, these filters are a reliable choice for maintaining clean air in your home or office.