Efficient Ventilation: Bathroom extractor fan cover designed for air supply ventilation only. Round air vents Provide efficient ventilation and help to reduce humidity levels in bathroom, kitchen, garage, or any other room. High-Quality Materials: Internal vent cover is made of durable white RAL 9016 polymer coated steel, ensuring robustness against corrosion. Connection Diameter: 79mm / 3.1 inch - External Diameter: 107mm / 4.2 inch Adjustable Airflow: Air vent cover is equipped with a threaded spindle mechanism, allowing effortless adjustment of airflow. By simply rotating the middle disc, you can widen or narrow the opening, effectively customizing ventilation according to your preference. The airflow can be fully closed if desired. Universal Compatibility: Ventilation cover is equipped with clamp springs which are suitable for all types of round 80mm ducting. Installs as wall cover or ceiling air vent cover and is compatible with all types of air conditioning or ventilation systems Ideal Outlet for Ventilation System: Adjustable vent cover is equipped with a sound insulation gasket that provides a tight seal, minimising noise and air leakage. With its quiet operation and optimal airflow, this Air vent grill is an effective choice for concluding ventilation systems in bathrooms or other spaces, ensuring efficient air circulation and maintaining a comfortable environment, Weight: 0.4629707502 pounds, Manufacturer: Steinberg14