1.Strictly according to IATF 16949 quality certification system process production.    2.The advantages of automatic welding ensure the reliability of welding strength, no leakage stability, installation position accuracy.                                                  3.Teflon piston-ring integrated whith piston,not only reduce the friction and noise,also avoid inner-leakage.                        4.Unique gas-charge method by injecting the gas from the bottom,meanwhile,sealing it by projection welding.It can ensure the consistency of gas pressure and no damage to the oil-seal lip.                                         5.Gas-filled shock absorber injected with pure N2,which not only keeps stability of damping force,but also reduce aerification and foaming,meanwhile,extend the effective life.                                                         6.Hard-chromed piston rod with micro-grooves,increasing the rigidity and reducing friction,keep better lubrication action.               7.Advanced multiple-type bottom valve system structure,guarantee multiple damping forces realized and match the suspension system better.                             8.High-quality working liquid,ensure all-weather adaptability under different temperature conditions.                         9.Automatic paint surface-system lines,assure weatherproof under all different conditons and excellent appearance.               10.Shock mounting and spring top of strut assembly passed 3000,000 times tension test, to make sure the physical property of it.