... fan and blower, external rotor axial fan,ventilation fan, Duct fan, shaded pole motor, external rotor fan motor,aluminum die casting parts ... , stator and rotor, Developing moulds and so on ... ) Illustration of Model YWF-68L15P41.YWF: Asynchronous external rotor motor2. 68: Motor air gap diameter3: L15: Core length code4: ...