... ball bearingOil bearing 15000 hoursCharacteristic.The company of cross-flow fan diameter from 25mm to 150mm, from 50mm to 1150mm length ... specifications.Cross flow fan using aluminum alloy materials, light weight, large air volume, low noise, high strength, low vibration, high Wen Jia, long ... -050A: 110 / 220V 40 / 42W, blade diameter 50MM, length 42CM:. high quality cross flow impeller