... 2.three aluminium blades, dense grille 3.mute operatin CE industrial electric stand fan 30SIZE: 30'',26'',20'',18'' 1 ... .industrial stand fan with adjustable speed2.three aluminium blades, dense grille3. ... "500mm220V/380V/50HZ120*16mm150W1350FL-45018450220/50Hz104*22mm100W1350 30'',26'',20'' INDUSTRIAL STAND FAN,