4 Inch x 8 FT Insulated Flexible Duct with 2 Clamps, Noise Reducing, for Ventilation Systems grow-light controlled wirelessly for optimal efficiency

controlled wirelessly for optimal efficiency

balance pressure

【High quality】Air vent louver are made of aluminum alloy

grow tents

and contaminants

4 Inch x 8 FT Insulated Flexible Duct with 2 Clamps, Noise Reducing, for Ventilation Systems grow-light controlled wirelessly for optimal efficiencyProduct Information Color: Black Ducting Opening Size: 3 inch 4 inch, 5 inch Strectch Lengh: 4 FT 8 FT Thick layer of PVC&2 layers of Aluminum on this ducting prevents gas leaks. Works with extractor and inline duct fans, carbon filters which are 3" 4" 5" in diameter. Application HONGUAN duct silencer is suitable for HVAC system. It will move and deliver air in kitchens (cooking exhaust), green houses and grow rooms (air Circulation, intake, exhaust