... ,fan body and cover:galvanized steel,handle: die-cast plastics,cable length:3m motor: aluminum ... Portable ventilator connect with flexible duct,with easy to carry characteristics, It can be used at tunnel ... basement, ship building or welding, laboratory ,warehouse to ventilate waste air,harmful gas,dust ect.features ... make low noise and light weight due to die-casting aluminum alloy. 5)with good ...