circular ventilating fan 1. power red blade 2. copper wire with strong air flow 3. mute motor 4. 220V/380V/50Hz circular ventilating fan 1.Various size for your choice, 10'/12'/14'/16'/20'/24'2.motor with copper or aluminium wire.3.adopt wind power engineering theory, strong wind, low noise, durable motor. Be suitable for workshop, warshouse, restaurant and so on. It can be sunstroke prevention ...