... fan, axial ventilation fan,ventilator,poultry farming equipment,livestock equipment,greenhouse ventilation system,ventilator humidifierWe are a professional ... kwMaterialsHammer style9FJ-900B1000*1000*4000.55 shutter, frame, wind set, fan blade are galvanized9FJ-1000B1100*1100*4000 ... .5Hammer style9FJ-900B1000*1000*4000.55shutter, frame, wind set aregalvanized, blade is stainlesssteel 9FJ-1000B1100*1100 ...