The HEAVY DUTY FILTER 13-1/4+17-5/8+1 from AAF International is designed for high-performance air filtration in challenging environments. Measuring 13-1/4 inches by 17-5/8 inches with a 1-inch depth, this filter is ideal for various HVAC applications. Made from high-quality materials, it ensures durability and compliance with industry standards. The filter effectively captures airborne particles, providing clean air for commercial and industrial use. Its user-friendly design allows for quick installation and replacement, making it a practical choice for heavy-duty filtration.