air duct Light weight Oil,Acid,Alkai&high temperature resistant&fire-retardant PVC Good price,fine quality,satisfying service Air ... /exhaust duct,ventilating duct,flex duct 1,Material: PVC flam-resistant static-free fabric with steel wire reinforced.2.PVC Thickness ... temparature,acid,alkali,oleic acid, harmful liquid state gas ect.Temperature range:from -15°Cupto +80°C.Application :Widely used in ...