The AAF Flanders 14x20x1 Air Filters are high-quality white flat panel filters made in the USA. This box of 12 filters features a Strata Density design for improved filtration efficiency. The filters are constructed with recycled paperboard filter frames and are shipped by a USA shipper, ensuring a reliable and environmentally friendly product. Perfect for maintaining indoor air quality and ensuring optimal performance of heating, cooling, and air systems in your home.