Explosive-proof duct

1,made of fire-retardant pvc material and helix steel wire 2,PVC Thickness:0.35mm-0.65mm 3,Diameter:4" to 60" stander length:5m or 10m 4,Main color: black, orange ect. 5,Character: enduring high temparature,acid,alkali,oleic acid, harmful liquid state gas ect. the duct body is without any lapping defect,with the strong points of high dense,durable abrasion and corrode.anti-static,low wind resistance,strong anti-pressure from 3000pa-5000pa. Temperature range:from -15°Cupto +80