16" 18" 20" powerful stand fan

16"18"20"powerful stand fan:Our factory isspecialized in manufacturing of various types of ventilating and industrial fans.We have years of production and management experience.I believe we areyour best choice. Details: 1.Optimized impeller structure; 2.Large air volume and low noise; 3.Motor with a long service life; 4.Available options:Stand type and Wall type; 5.16"18"20"different size; 6.Three speeds,oscillating angle adjustable,two or three blades; 7.Suitable for heat-stroke prevention and cooling-down temperature in mineral factories,workshop and warehouse ect,for venlilation and improving enviroment;