Keywords: PU vacuum tube, PU steel telescopic tube, PU ventilation pipe, PU hose retractable wire nature: an extreme abrasion resistance, strength copper wire reinforced hose, high pressure, vacuum and compression resistance, superior high axial strength so smooth transport material, good chemical resistance. 2. Bending radius is approximately equal to three times the diameter, electro-static discharge. Construction: Flexible copper wire coated with sturdy on the wall; wall: extreme wear and tear of polyurethane materials, about 0.6-0.9MM wall thickness, smooth wall; more than 10 times faster than ordinary PVC hose, rubber hose high wear resistance . Purpose: 1.PU vacuum tube is mainly used for ventilation vacuuming. 2 strong current high rate of wear particle strength, sand, gravel, fine useless glass chips and dust, gas and liquid environments, transport silo. 3. Mechanical glass industry, wood industry, steel industry, plastics industry, the pit, the shipbuilding industry, cement industry, such as delivery tube 4 when tough protective tube. 5 can also be used in food industry, the pharmaceutical industry. This product can satisfy the requirements of all walks of ventilation vacuuming. Temperature range: -40 ℃ to about +90 ℃, short time up to +130 ℃.