1.Plastic polyurethane material conforms to the ROHS environment protection requirement. 2.High elasticity: small bend radius enables PU tube to pass through the tight space. 3.Anti-knot: better anti-knot effect than other plastic tube. 4.Excellent flexibility: it can bear repeated expansion. 5.Anti-abrasion: long working life and suitable for the environment in which it is easy to be worn. 6.Low permeability of gas: relieve the problems of leakage and pollution. 7.Good anti-solubility: no solvent leaks, therefore it will not pollute the environment. 8.Low compression: maintain excellent physical character. 9.Wide resistance: it has certain resistance to chemicals, water, fuel, oil and bacterium.