Upgraded Office chair cylinder replacement: More effort- saving handle accessories, no tools required, no need to disassemble your chair gas lift cylinder. (Package does NOT include the cylinder.) | Office chair replacement parts, Install with bare hands. If it's not tight enough by hand, try using a screwdriver to get it as tight as possible. | The height of the chair can be adjusted and fixed according to your needs. | Universal suitable for most office chairs, the cylinder diameter is within 25-28mm. | Exceeding other low-quality plastic products on the market, the stainless steel material does not need to worry about cracking. | Fix your sinking chair, solve your worries and save the high cost of a new chair. | Updated the handle accessories, which can save more effort. You can use it according to your needs.