PRODUCT DETAILS 16x20x1 MERV 11 Air Filter for Air Conditioners, Furnaces, and HVAC Systems. Comparable to MPR 1100 / FPR 7. 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) ADVANCED DUST DEFENSE MERV 11 Filtration Effectively Traps 95% 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.