... 3)High technical,energy saving 4)Copper motor Ventilation fan, axial ventilation fan,ventilator,poultry farming equipment,livestock equipment, ... style9FJ-900B1000*1000*4000.55 shutter, frame, wind set, fan blade are galvanized9FJ-1000B1100*1100*4000.759FJ-1250B1385 ... .5Hammer style9FJ-900B1000*1000*4000.55shutter, frame, wind set aregalvanized, blade is stainlesssteel 9FJ-1000B1100*1100*4000.759FJ ...