The Nordic Pure MERV 12 4-inch Pleated Furnace Filters are designed to enhance your indoor air quality by effectively capturing airborne particles. These filters, available in a convenient 6-pack, feature electrostatically charged media that attracts and traps dust, pollen, pet dander, and other pollutants. Perfect for use in home HVAC systems, each filter measures 16x25x4 inches, ensuring a perfect fit for your furnace. Upgrade your air quality with Nordic Pure's reliable and efficient filtration solution.