Material: The exhaust fan is constructed from thickened metal with an integrated design. The fan's safety net cover features high density and good hardness, ensuring durability and strength. Strong Wind Force: Equipped with high-speed performance and powerful airflow, the exhaust fan utilizes double ball bearings for efficient smoke extraction. Low Noise Design: Designed with a wide-angle airflow system to minimize noise during operation, providing a quieter cooking environment. Integrated structure allows for easy installation. Seven Blades: Seven-blade design increases air volume, reduces stress on individual blades during high-speed operation, and maintains stable airflow performance. After-sales Service: If you have any questions or issues, please contact the seller directly for assistance. Specifications: Material: Metal Size (inch): 6, 7, 8 Hole Diameter (mm): 150-160, 180-190, 200-210 Length (mm): 150, 140, 150 Diameter (mm): 150, 180, 200 Voltage (V): 220 Frequency (Hz): 50 Power (W): 40, 50, 60 Notes: Slight color variations may occur due to lighting and screen settings. Minor measurement deviations may exist due to manual measurement. Includes: 1 x Exhaust Fan, 1 x Base