The external rotor cooling fan adopts new motor technology, which reduces energy consumption by 60%, intelligently controls air volume and wind pressure, and the external rotor cooling fan has small vibration and good mute effect, which can satisfy your all-round pursuit of fan quality and performance!   Help us to provide preferably product fan for you 1.Fan type,DC/AC 2.Case Size(Dimensions) 3.Bearing(Sleeve /Ball bearing) 4.Rated Voltage 5.Speed 6.Air flow 7.Air pressure 8.Noise 9.Wire,2/3/4 wires/Terminal 10.Wire length 11.Target Price