Upgrade your HVAC system with this Insulated Steel Boot designed for efficient air distribution and long-lasting performance. Measuring 10" L x 4" W x 6" H, this boot is crafted from durable galvanized steel with a protective ASTM-A653 CS Type B finish to resist rust and corrosion. The top-hole configuration makes it easy to connect to ductwork, while the built-in insulation helps reduce energy loss and improve efficiency. Perfect for residential and commercial HVAC installations, this insulated boot ensures a secure fit and reliable airflow in any system.