The PERFECTPLEAT ULTRA 16x18x1 by AAF International is a high-performance air filter designed for optimal filtration in HVAC systems. With dimensions of 16 inches in depth, 18 inches in width, and a thickness of 1 inch, this filter features a MERV 11 rating, effectively capturing a variety of airborne particles including dust, allergens, and smoke. Its advanced pleated design maximizes surface area, ensuring superior airflow and extended service life. Suitable for both residential and commercial applications, this filter is constructed from high-quality materials that comply with industry standards, making it a reliable choice for maintaining clean indoor air.