Backdraft Damper Ducting Insert Mushroom Supplies Their roots can’t seek out

Their roots can’t seek out nutrition in the ground

No flush needed

15 minute on/off

reef tanks

The overall height has been reduced

Backdraft Damper Ducting Insert Mushroom Supplies Their roots can’t seek outMade with black galvanized steel, An 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. Product Length: 5. 03 inches