The PerfectPleat HC M8 air filter measures 13-1/4" x 37-1/2" x 1" and is designed by AAF International for high-efficiency filtration. This filter features a pleated design that enhances airflow while capturing airborne particles effectively. Constructed with durable materials, it meets industry standards for air quality and performance. Ideal for HVAC systems, it ensures optimal air circulation and filtration in commercial and residential applications. The M8 rating indicates its capability to filter out a significant amount of dust and allergens, making it suitable for environments requiring clean air. Replace your filters regularly to maintain system efficiency.