The 16x25x1 AC Furnace Basic Dust Air Filter by 3M is a high-quality pleated filter designed for use in air conditioners and furnaces. With a MERV rating of 5 and a filter life of 3 months, this gray filter effectively captures dust and airborne particles to improve indoor air quality. The pack includes 6 filters, each measuring 16 inches in length, 25 inches in width, and 1 inch in depth, making it easy to install and providing a clean and efficient filtration solution for your heating and cooling systems.