... . 3.antistatic duct. antistatic flexible duct1,made of fire-retardant pvc material and helix steel wire2,PVC Thickness:0 ... points of high dense,durable abrasion and corrode.anti-static,low wind resistance,strong anti-pressure from 3000pa-5000pa.Temperature range:from ... or welding, laboratory , engine room ,the municipal conduit engineering,fire-fighting to ventilate or exhaust waste air,dust to supply ...