... electronic oven, lightwave oven and air-purify machine,etc.cross flow fan max length is 520mm, the diameter is φ60mm ... low noise and long life expectancyThe material of the cross flow fan is aluminium alloy, so it have the ... advantages as following: Light, heavy air flow, low noise, strength, low pressure, good anti-temperature ... of the fan is: Aluminium alloy DC cross flow fan 30*29