... less vibration 3.reliable operation 4.excellent functioning cross flow fan;Name: Ventilation fanMaterial: AluminumSize: wheel length 75mm---360mm ... UL certified.Description: distribution of air velocity is uniformUsage of cooling device: power source device, transformer, duplication macline, projector ... and warm keeper, electrical cooker, hair dryer, etc.Fan can be served in insulation class H.Low noise ...