Super powerful industrial stand fan / wall fan, 18 INCH / 20INCH / 26INCH/ 30INCH *3 speed, with oscillating angle adjustable *2 blades / 3 blades with optimized impeller structure *6 kg / 9 kgheavy blade , more safe design All the parameter can be adjusted according to your demand. Low noise and small power consumption, Powerful air delivery, Moter with a Long service lifetime. It is suitable for : *heat-stroke prevention and cooling down temperature. *Mineral factories , workshop and warehouseect. *Improving environment