Portable Air Ventilator. light weight good capability novel pattern the strong suction and easy to move. Size 8 10 12 14 16 18 20 Main material shutter 7pcs dia cast aluminum alloy fan body and cover galvanized steel handle die cast plastics cable length 3m motor aluminum alloy with America Japan Europe Taiwan styles plug for choosing. can be equipped with wheel for big model which has a durable and firm structure it can move easily. Application Our JIALONG series portable propeller ventilator has many strong points such as excellent function light weight novel design special manufactured for underground cable maintainance shipping making exhaust for fire fighting piping construction and in other violent working situation for ventilator. with good insulation high pressure and large air volume character. 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.