The AC Infinity 6" Damper Airflow Ducting Insert is a high-quality antidraft duct insert designed for use with range hoods, bathroom fans, and other home HVAC applications. It features a galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. The outer rubber gaskets create an airtight seal, preventing backflow and debris from entering ducting. This ventilation tool is perfect for preventing cold drafts and maintaining airflow efficiency in ventilation systems.