size: 1380*1380*400 high efficence, and low noise, high presurre, low power consuption. 1. Fan Box Material: iron steel panel. 2. Fan Blade Material: iron steel panel. 3. With net, without shutter 4. Motor: 220V/50HZ/60hz, 1Phase, or 380v/50hz, 3 phases, 1Speed, Home-made motor.