... -proof ceiling fan Blade diameter: 250mm Voltage: DC12V/24V Heavy duty motor fanSpecifications ... , Aluminium flange Stand against intense shake,tough and durableHigh-power,high speed,heavy windShock-proofWidely used in construction equipment , tractor and ... automotive fans feature in compact structure, perfect shape, energy-saving, quick start-up, heavy wind, low noise, stable performance, etc. and are ...