High QualityThe heavy-duty office chair gas cylinder, made of thick alloy steel, is a gas cylinder of the highest safety class 4 and has passed the internationally recognized SGS test Achieves the European standard TUV4 certification. Maximum safety The extremely robust construction can withstand a heavy load of 1000 lbs wear and is explosion-proof. At the same time guarantees a long service life with heavy loadsgreat for chair gas lift replacement.If there is a protective cap on the top of the gas cylinder, remove it from the top surface. Height AdjustableThe office chair gas lift with an adjustable stroke of 430mm (16.9"(inch)) - 290mm (11.4"(inch)) ensures hassle-free height adjustment and greater stability without the height being unfixed and while of use wobbles.cylinders There is no noise when rotating, and 360 degree rotation is more flexible. General ApplicationThis gas lift strut fits most standard size office chairs, swivel chairs, executive chairs and other chairs, allowing you to relax while sitting while protecting your spine and preventing the shock of rapid descent when you fall off in height . very nice chair parts.Please measure the size before purchasing office chairs parts. Easy Installationoffice chair replacement gas liftYou just need to take out the old pneumatic cylinder and insert the new one manually. No tools are required for installation, and the whole process does not take much time - in just 5 minutes your problems will be solved. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store