Φ175*70mm6.89*2.76 inSpeed:2000-4000 RPMAirflow:230.60-461.20 CFMPressure:15.23-60.92 mmAq Nosie:40.3-70.2 dBAVoltage:12V-48VMotor: DC brushless external rotor motorFrame:AluminiumImpeller:PBTBearing System : 2 球,Longlife 套筒,FDBInsulation: Class AOperation Temperature:-10℃-70℃