portable fan, blower 1,casing: steel; blade:aluminum 2,large ... Portable fanPortable blower, Portable ventilator(portable blower,air blower,exhaust fan) Size:8" 10"12" 14"16" 18" 20 ... ect.Main material: shutter: 7pcs dia-cast aluminum alloy,fan body and cover:galvanized steel,handle: die-cast plastics, ... styles' plug for choosing. can be equipped with wheel for big model, which has a durable and firm ...