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