High-quality productWall-mounted exhaust fan, high-quality metal body and blade design, stable operation, large air volume and low noise. The shell is sturdy, sturdy, corrosion-resistant and not easily oxidized. Pure copper motorBuilt-in powerful copper winding motor. The pure copper coil has strong airtightness, fast running speed, low noise, stable operation, and enough power to ensure that the fan blades flow out. Main parametersVoltage: 220V, Speed: 2800RPM. Dust-proof designThe axial flow fan has a grille and a powder-coated steel wire safety shield, which can more safely prevent debris from being sucked into the fan and damaging the fan blades. Widely usedExhaust fans can be used for ventilation and heat dissipation in supermarkets, shopping malls, production workshops, oil exploration factories and warehouses. Voltage: 220V Speed: 2800r/min Motor power: 4 inch: 20W Air volume: 4 inch: 140 m3/h Packing list:1 x Ventilating Extractor fan