... fan 3.low noise,large wind,high speed 4.durable solid,long life use Low Noise High Speed Axial Flow Fan: ModelSizeFlow-rateSpeedVoltagePowerNoisePackage ... 380/50550541 1.Optizization desigh,Excellent performance,Energy saving,Great power and flow noise.2.Ventilated and air change well, ... ,more safety. 4.The adoption imports solid lubricant,having no miscellaneous quality.5.OEM service is acceptable.