Wall Mount Duct Shutter 4 - White Steel 4" Wall Mount Duct Shutter rock-bottom • Must be used in

• Must be used in an enclosed fixture only

making it simple to reach the optimal Vapor Pressure Deficit for maximum growth

which also increases the lifespan of the pump by stopping power to it when the water level gets too low

The mold and mildew spores are sterilized and then washed off the plant as a biodegradable soap

• Washable and durable—can be used season after season

Wall Mount Duct Shutter 4 - White Steel 4" Wall Mount Duct Shutter rock-bottom • Must be used inA wall mounted shutter designed for use with grow rooms, dryers, attics, and other HVAC applications. Features built in rubber stoppers that dampen slamming vent blades and ensure complete blockage. Non return thin louvers that close when fan is not in use to prevent outside air and debris from entering. Durable, lightweight steel body that is rust resistant can withstand most weather conditions. Duct Opening Diameter: 4 inches Front Plate Size: 6. 69