100% brand new and high quality Features: Strong power, double ball bearings, longer life. The fan casing is made of galvanized steel and the impeller is made of stainless steel. The motor is equipped with slide bearings. Both smooth and step speed control is performed with the thyristor or autotransformer controller. Several fans can be connected to one controller in case the total power and operating current do not exceed the rated controller values. Combined supply and extract ventilation systems for various premises where high air flow at relatively low system resistance is required. Inline duct fans help filter out air pollutants such as exhaust, fumes and odors. Breathe easier and also create a cleaner environment for your plants. Multi-use fan is great for indoor growing, grow tents, greenhouses, indoor gardens, or anywhere you want to assist an air ventilation system. Specification: Voltage: 220V Power: 25W Frequency: 50Hz Rotating speed: 2600r/min Material: Iron Dimensions: 9.5x7cm/3.74x2.76inch Color: White & silver Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Duct Air Ventilator