<b>Kaleurrier gas lift cylinder</b> is high quality,sturdy and durable,gas pressure stable,in UNIVERSAL size which fits most drafting chairs, task chairs, drafting stools,office & Salon stools,etc.Its longer stroke fits users of varying heights.<br><br> <b>SPECIFICATIONS:</b><br> * Outer steel:2" diameter for body,1.57" for bottom.Fits 2" diameter centre hole base <br> * Inner Shaft:1.1" diameter.Fits 1.1" seat plate hole(control mechanism)<br> *Minimum length: 13.5 inches<br> *Maximum length when fully extended: 21.5 inches<br> *Stroke(adjustable height range): 8 inches<br><br> <b>QUESTIONS:<br>ANSWERS:</b><br> 1.How to choose a suitable gas lift cylinder?<br> Firstly,quality is very important for pneumatic products.Kaleurrier gas lift cylinder has been passed official SGS tests and certification,meet ANSI/BIFMA X5.1 & EN 1335 General-Purpose Office Chairs standard,used high quality materials,to make sure it works smoothly,be safe during use,explosion-proof.<br> Secondly,Our gas lift in standard size fits most drafting chairs, task chairs, salon or office stools,but it is important to measure dimensions before you purchase it,to make sure that you get the right size.<br><br> 2.How to replace the damaged gas lift with a new one ?<br> Please refer to the tips on the photo or search a video in Youtube.<br><br> 3.If the cylinder does not fit my chair or stool,or does not work, what shouldl I do?Or have more questions?<br> Please contact with us - click “contact seller” first.We will give you a proper solution in 12 hours.<br> We’d love to hear from you!