1, insulation, anti-jamming 2, flame-retardant 3, anti-wear 4, light weight, easy to install 5, corrosion ... gas,high resistance to impact force, acide and so on.3).High oxygen value, good combustion resistance, self extinguished.4).Smooth ... buyers required, or even have adhesive tape on the surface.6).Sizes,outlooking color, thickness of the tube is optional, price ...