100mm Gravity Flap Rnd Spigot White

100mm Gravity Flap Round Spigot is designed to allow air to flow out efficiently while preventing unwanted backdraft, cold air, insects, and debris from entering your ventilation system. Operating automatically using gravity, the flap opens when airflow is present and closes securely when the fan is off. Key Features: 100mm Round Spigot Connection Automatic Gravity-Operated Flap Backdraft Prevention Durable Weather-Resistant Construction Smooth Airflow Design White Finish Easy Installation Low Maintenance