... cross flow impellerFan material: aluminum alloyBearing: ball bearings or bearingMotor capacitor type: AC, AC, DC shaded-pole without carbon brush type ... materials, light weight, large air volume, low noise, high strength, low vibration, high Wen Jia, long life advantages.The perspective of cross ... -050A: 110 / 220V 40 / 42W, blade diameter 50MM, length 42CM:. high quality cross flow impeller