Backdraft Damper Ducting Insert Mushroom Supplies 9%—a highly stable output frequency—the

9%—a highly stable output frequency—the Quantum Dimmable ballast lets you run your lamps at the strength you need allowing you to control your light spread

15 minute on/off

NPK is N=30lbs per ton P=34lbs per ton K= 12lbs per ton

reef tanks

Dimensions: 13

Backdraft Damper Ducting Insert Mushroom Supplies 9%—a highly stable output frequency—theMade 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