... polluted gas source and so on.Universal Fume Extraction Hood:Dome HoodNO.3009Advantage1.The material is stainless stell,which is easy ... erode.Materal DescriptionThe whole set equipement include Scalable stainless steel dome hood, manual adjusting stainless steel wind-lead-tube and so ... of 304 stainless steel,according to the experiment needing,the dome hood can adjust the high within fixed tange ,and it ...