... ,quiet small and easy to use Popular 4 inch air cooling usb fan 1.Size: 149.73*96.3*146.5mm2. ... box:We are professional manufacturer of brushless DC cooling fans, AC cooling fans and blower fans, which are widely applicable ... to machine equipment cooling, heat dissipation, like PC cooling, Car refrigerators, air-conditions, kitchen exhaust fan, industrial ventilation. More than ...