16x20x1 MERV 8 Air Filter for Air Conditioners, Furnaces, and HVAC Systems. Comparable to MPR 600 - 700 / FPR 5. Accecraft furnance filter is a cost-effective and practical reusable furnace filter.(Include:1 Reusable ABS Frame + 6 Pack Replaceable Quality Furnace Filter Media)Replace every 60-90 days for optimal performance.(Actual Size: 15.63x19.72x0.87Inch)