Features: Efficient and Durable: Balanced centrifugal impeller and high-strength casing, with a long service life. The motor adopts lubricated bearings, running quietly and without maintenance. High Speed and Low Noise: With a diameter of 4 inches and a speed of 2800 rpm, the noise is low and will not interfere with your work or cause any harm. Easy to Install: Compact structure, light weight, easy to install in areas with very small available space, with sufficient power cables inside, making it easy to use. Widely used: Increase airflow and exhaust to eliminate heat and odors or inhale fresh air. It can be used as an intake or exhaust fan for planting tents, kitchens, bathrooms, basements, attics, garages, workshops, etc. Practical: The optimized design of the fan blades has the advantages of low noise, large air volume, high efficiency, and stable air pressure. The surface is treated with process spraying, with soft and bright colors that remain unchanged for a long time. Specifications: Maerial: Iron+spray molding Cylinder Diameter: 95mm Height: 75mm Power: 20W Air Volume: 140m3/h Speed: 2800 (r/min) Notes: 1. Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. 2. Please allow slight dimension difference due to different manual measurement. 1 * Ventilation Fan