Suitable: this gas pressure damper is suitable for office chairs, swivel chairs and other chairs with a medium seat height and a mechanism with height adjustment. Simplified installation thanks to the conical bottom and top, making it easier to insert the gas spring into the turnstile or seat mechanism Quality branded product with deep suspension buffer, gas lift office chair ensures springy, comfortable and relaxed sitting. Safety level class 3 (standard: class 1 or 2) Repreparation: Do you love your office chair but the gas lift is broken? - With this gas lift you can bring it back to life! TÜV, GS and LGA tested product Made in convincing quality, our Fgas pressure spring office chair liner can withstand long-term use without any problems. Very easy installation and replacement with our practical instructions (English language not guaranteed)