The AMERSEAL BLUE 3-PLY P 15 1/2 + 27 by AAF International is a high-performance air filter designed for superior filtration efficiency. This filter features a three-ply construction that enhances its durability and effectiveness in capturing airborne particles. Measuring 15.5 inches in width and 27 inches in height, it fits seamlessly into various HVAC systems. The filter is compliant with industry standards, ensuring reliable performance in both commercial and industrial applications. Its blue color indicates its specific filtration capabilities, making it easy to identify. Ideal for environments requiring stringent air quality control, this filter is a vital component for maintaining clean air in any setting.