MIVIDE 2-Pack 4 Inch Tailgate Damper, Backflow Shutter Damper, Inline Fan Vent Deflector with Spring Folding Blades for Range Hoods, Bathroom Fans and Kitchen Fans

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  • Product Dimensions: 4 inch Return Air Damper Diameter 100mm/4 inches, Length 88mm/3.5 inches, Thickness 0.5mm/0.0 inches. Please confirm the size before purchasing.
  • HIGH QUALITY MATERIALS: The 4 inch inline fan ventilation deflector is made of high quality galvanized steel, the shaft and spring are made of stainless steel, the product is very strong and well made with good spring tension.
  • Easy installation: Insert the return cap into the vent pipe until it stops. The position of the spring should be mounted horizontally for optimal opening and closing. The downwind shutter is installed so that the damper blades only open in the direction of the flowing air.
  • Practical Design: The rear wind damper has a smooth-running spring. The return lid opens and closes automatically at low air volumes. The return air damper can ventilate the area and avoid the accumulation of toxic gases.
  • Wide range of uses: These one-way airflow duct inserts can be widely used in exhaust fan ducts, clothes dryer ducts, range hoods, heating ducts, vents, and other residential and industrial applications.
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