PRODUCT DETAILS 20x25x1 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: 19.72x24.6x0.87 Inch) ADVANCED DUST DEFENSE MERV 8 Filtration Effectively Traps 92% of Airborne Particles Without Hindering Airflow. It can absorb most pollen, pet hair, and other particles, ensuring a consistently effective filtration performance over an extended period of time. Accecraft team use expertly design to improve indoor air quality and create healthier living spaces.