Check the listing for details. 14 To 22 Long Adjustable Gas Lift Cylinder Tube For Office Chair Stool, NEW. Condition: New. Listed at 29.61 USD. 14 To 22 Long Adjustable Gas Lift Cylinder Tube For Office Chair Stool, NEW Chair replacement parts: Suitable for rolling stool ,gaming chair,office chair,smooth rise and fall, and supports 360 degrees of rotation.Study & Heavy Duty: Certified by SGS test (USA) & Higher Standard LGA test (GER), use of high quality materials and thickened outer steel, this gas lift cylinder is of really high quality and durability, weight capacity: 450 lbsUniversal size: The lowest height is 14.3", the highest height is 22.3", which means this hydraulic lift has a height range of 8 inches. In most cases,when you finish assembling the chair, the height of the chair is about 20-28 inches.Longer service life: These high standard office chair cylinder are more reliable and you get a free replacement for any non-human quality problem within 5 years.Easy to Install: Usually you will need to use a hammer to remove the old gas lift cylinder from the chair base and replace it with a new one. (We recommend that you search for "gas lift replacement" on YouTube)