The KOCH FILTER CORP NESHAP 99 Panel measures 16W x 20L inches and is sold in a pack of 24. This panel filter is designed to meet stringent air quality standards, capturing a high percentage of airborne contaminants. Its robust construction ensures durability and long-lasting performance in various applications. Ideal for industrial and commercial HVAC systems, this filter complies with NESHAP regulations, making it suitable for environments requiring high air purity. Its design allows for easy installation and maintenance.