Pvc steel wire helix duct \napplication:\nespecially ideal for ventilation and air conditioning system, industrial vacuum cleaner, and granulate conveying systems. as suction and transport hose suitable for below substance:\n•\tgaseous medias such as vapors and smoke.\n•\tliquid medias. \n•\tsmall granules such as dusts, powders and etc. \nfeatures: \n•\thighly flexible with low weigh \n•\textremely compressible\n•\tsmooth interior \n•\thighly transparent wall \n•\tsmall bending radius \n•\tcomply to reach\nworking temperature range \n-20 °c to +70 °c (