- Axial Flow Duct Type Tubular Fans - Directly Coupled Motor. - Impeller Is Manufactured From Polypropylene Blade. - Hub Is Made By Cast Aluminium. - Duct Fan With Double Flanged Cylindrical Tube Case. - Rigid Construction In Sheet Metal. - Air Flowrate : 3.150 - 96.500 m³/h (Min. - Max.)