Description: 【Premium Material】: Crafted from thickened PP material, this spherical air vent is lightweight yet sturdy, offering resistance to break and reducing condensation for longlasting performance 【Adjustable Airflow】: Featuring a spherical nozzle design, this vent cover allows for a wide range of airflow distribution. It provides 360-degree flexible adjustment with the ability to tilt the nozzle up to 30 degrees in any direction for optimal air circulation 【Easy Installation and Maintenance】: The soffit exhaust vent feature rotating lock design, making it simple to detach and reattach the round air vent cover for cleaning and maintenance 【Versatile Applications】: Ideal for various settings, this Air Vent Cover is suitable for use in home offices, living rooms, bathrooms, as well as larger spaces like factories, stadiums, shopping malls, hotels, train stations, and theaters 【Dimensions】: This product is available in 4 sizes to fit a 3/4/6/8 inch ceiling or wall vent, ready to enhance your ventilation system efficiently Specification: Material: PP Size Chart: Optional Size: For 3inch: Outer Diameter: 11.5cm/4.53inch Center Hole Diameter: 3cm/1.18inch Bottom Diameter:72mm/2.83inch or For 4inch: Outer Diameter: 13.8cm/5.43inch Center Hole Diameter: 4.5cm/1.77inch Bottom Diameter: 9.6cm/3.78inch or For 6inch: Outer Diameter: 20cm/7.87inch Center Hole Diameter: 7.5cm/2.95inch Bottom Diameter: 14.8cm/5.83inch or For 8inch: Outer Diameter: 26.5cm/10.43inch Center Hole Diameter: 10.5cm/4.13inch Bottom Diameter: 19.8cm/7.80inch Package Includes: 1 Air Vent Cover Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.