metal industrial exhaust fan with whole metal, 1.equipped with strengthened iron 2.Minimum noise,high static pressure application 3.Over-temperature protector 4.Practical,fashionable and almost perfect design We also produce the series of other models,details are as follows:ModelPower/VoltageAir flow DimensionsShape sizeOuter packingHL-250S-25C 220V/40W840m3/min Φ250295*295*160mm 6pcs/cartonHL-250S-30C 220V/45W1080m3/min Φ280 350*350*185mm 6pcs/cartonHL-250S-35C 220V/75W2880m3/min Φ330410*410*185mm 6pcs/cartonHL-250S-40C 220V/145W2880m3/min Φ375475*475*230mm 6pcs/carton