HOMCOM 100mm Universal Replacement Pneumatic Gas Lift Cylinder For Office Chairs &#x2705;UNIVERSAL REPLACEMENT: This replacement pneumatic chair gas lift is a universal spare to fit most 2 bases on executive, computer and office chairs. &#x2705;ADJUSTMENT HEIGHT: Adjust the height of your office chair by 4. &#x2705;SMOOTH MOVEMENT: The full 360-degree rotation will make you want to spin circles in your chair all day. &#x2705;HEAVY DUTY DESIGN: Made from durable steel so it will easily hold up to everyday use for your pneumatic cylinder chair. &#x2705;QUICK INSTALLATION: It can be installed easily, getting your computer chair back in working order in no time!