Search query: 3 inch backdraft damper

Product: HG POWER 3 Inch Round Air Vent ABS Louver Grille Cover White Soffit Vent with Built-in Fly Screen Mesh for Bathroom Office Kitchen Ventilation
Brand: HG Power
Color: white+black
Relevance: Complement
Specification:
color: white+black;
size: 3 inch;
material: high quality abs;
Fueature:
1. easy to use;
2. easy to install;
3. making fresh air for your house;
4. abs material which environment friendly and non-toxic;
5. give a better life to you.
NOTE:
the HG POWER air vents have 3''/ 4''/ 5''/6''/8''. you can find any size follow you want.
We have worriless 12-month and friendly customer service.If there exist any problems, please feel free to contact us. we will reply immediately in 24 hours.
HIGH QUALITY MATERIAL: Make of quality ABS material. environment friendly and non-toxic. make you have a better life.
EASY TO USE: the white panel can be freely detached, very convenient to clean and maintain.
EASY TO INSTALLATION: available for wall mounted or ceiling mounted. make easy to install in home or other inside/outside places.
SIDE: Diameter of 3 Inch, stylish design, ideal for room exhaust and ventilation use.
WHAT YOU GET: The HG POWER air vents has modern design and good looking. We have worriless 12-month and friendly customer service.If there exist any problems, please feel free to contact us. we will reply immediately in 24 hours.

Product: Revitalizaire Heavy-Duty Spring-Loaded Backdraft Damper. Install in Any Orientation Without Sealants or Solvents. Galvanized Steel Casing, Aluminum Blades and EPDM Rubber Seals. (6 Inch)
Brand: Revitalizaire
Color: Silver
Relevance: Substitute
The Revitalizaire backdraft damper contains a double-lipped EPDM rubber seal on both ends which allows for easy install without the use of sealants or solvents. With a diameter of 3 7/8th inches, the damper will interface with 4 inch ducts with little hassle. Once installed the damper can be twisted and adjusted without compromising the seal.

The 0.5mm spring-loaded design allows the unit to be installed in any orientation without compromising its ability to close

Strict quality control ensures no air gaps. The durable galvanized steel design allows the unit to function in any climate.
Double-lipped EPDM rubber seal facilitates easy install without the need for sealants while maintaining a tight seal. Can be twisted and adjusted after installation.
Thick spring allows unit to be installed in any orientation.
Strict quality control ensures no gaps.
Suitable for all climates.
Constructed with durable galvanized steel. Damper blades made from aluminum.