long life nitrogen gas spring for automotive mold1. High wear resistance;2. Good corrosion resistance;3. Excellent fatigue strength;4. Wide stroke range;5. Steady performance;6. Standard: ISO11901, Ford-wdx3560, Renault, etc7. Easy to install and adjust;8. Replacement for Dadco, Hyson, Quiri, Kaller, Misumi, etc;9. Long life..