... or 10m4,Main color: black, orange ect.5,Character: enduring high temparature,acid,alkali,oleic acid, harmful liquid state gas ect ... defect,with the strong points of high dense,durable abrasion and corrode.anti-static,low wind resistance,strong anti-pressure from 3000pa-5000pa.Temperature ... conveniently connect to the portable ventilator to use together. black anti-static flexible ventilator ducting