From the manufacturer
Standing/Pedestal Fan Triple Speed Heavy Duty Motor Height. 5 Feet When Extended Winding. 99.99% Pure Copper Wire Aerodynamic Blades Design For Better Air 3 speed options, Jerk free 90 degree oscillation and smooth running. Aerodynamically designed blades for maximum air delivery. Robust, heavy and broad metal base ensures absolute stability. Energy efficient Electrical Steel Sheet and 99.9% Pure Copper Wire. Sturdy brazed wire guards with fine chromium electroplated ensures corrosion resistance and full safety. Spring loaded height adjustment for pedestal models.