... materials, light weight, large air volume, low noise, high strength, low vibration, high Wen Jia, long life advantages.The perspective of cross ... shaft by the use of security film of oil, a fuel-free life of 15000 hours.Blower efficient use of the ... -050A: 110 / 220V 40 / 42W, blade diameter 50MM, length 42CM:. high quality cross flow impeller