50"exhaust fan 1.CE Certification 2.highest strength 3.big air volume XLXS drop hammer style ventilatorFan frame : made from highly galvanised Sheets in order to assure hightest strength and strong resistance to corrosion.Blade : 6 pieces stainless steel blades and the fan has all passed the experiment of homeostasis with big air volume,without deformation,no breaking,attractive and durable.Belt ...