This supply air duct plenum is made of galvanized steel with a 26-gauge thickness. It has dimensions of 16 x 16 x 36 inches and is designed for use in HVAC systems. The plenum is suitable for commercial and industrial applications and is compliant with United States manufacturing standards.

This plenum is ideal for those seeking a durable and reliable component for their HVAC system. It is made of high-quality materials and is designed to provide efficient airflow. The plenum is suitable for a range of applications and is compatible with plenum and filter boxes.