... of stainless steel blades and the fan has passed the experiment of homeostasis, large air folw, low noise, no distortion and no blending.4 ... weight, high strength.5)Bearing:High speed ,high strength ,low noise and long service life.ETXS series technical parameters: ModelDiameter Blades(mm ... 1.1kw 1380*1380*450 380v 50HZ Good Better Air Cooling Fan For Industrial