AC Infinity Galvanized Steel Backdraft Damper Ducting Insert Distribution Tubing a little magnesium goes a

a little magnesium goes a long way

framed bed for all of your planting needs

and resistance to cold weather stress

areas used by or in contact with humans

AC Infinity Galvanized Steel Backdraft Damper Ducting Insert Distribution Tubing a little magnesium goes aAn antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounts horizontally or vertically to prevent backflow and debris from entering ducting. Galvanized steel body with spring loaded aluminum damper blades that open with minimal airflow. Available in 4", 6", & 8" A ventilation ducting tool designed for