Features: *The exhaust fan is made of high-quality metal material, is not easy to be deformed, has excellent workmanship, durable frame and long service life. *It is durable and has a built-in copper motor with thermal protection for continuous operation. *The ventilation fan has high ventilation efficiency and very low noise during operation. *Suitable for all types of workshops, restaurants, warehouses. *Easy to install. Specifications: Color: Black Material: Stainless steel,Copper wire Opening diameter: 100-110mm Package Contents: 1 x Exhaust Fan Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. JINGT 4inch Industrial Ventilation Extractor Axial Exhaust Air Blower Fan Garage Advanced manufacturing technology, high reliability and high performance. Made of high quality materials, durable and practical. Brand New and High Quality. Your satisfaction is our greatest wish, if you have any questions, please feel free to contact us, we will provide you with comprehensive pre-sales and after-sales services.