#1 Office Chair Cylinder Replacement - Includes Removal Tool, Instructions & Gloves - Heavy Duty Gas Lift Hydraulic/Pneumatic Piston - Fits Most Herman Miller Aeron & Universal Standard Size EASY REMOVAL & INSTALLATION - The only chair cylinder replacement on Amazon to offer a cylinder removal tool. No more struggling and spending hours trying to remove your chairs old broken cylinder with tools you don't have. We will also make sure to help guide you through the entire process from start to finish. SAVE MONEY. REVIVE YOUR CHAIR - Fix your sinking office chair by replacing the cylinder instead of spending money on a brand new computer chair. We'll send you the highest quality cylinder on the market, our exclusive cylinder removal tool, detailed step-by-step installation instructions, gloves, and our money-back guarantee. You have nothing to lose! UNIVERSAL STANDARD SIZE - This pneumatic piston cylinder will fit almost every office chair on the market. If it doesn't fit your specific chair, return it for a full refund and we'll even cover the cost of shipping for you. EXTRA HEAVY DUTY & THE BEST ON THE MARKET - Our desk chair cylinders are all Class 4, which are known as the most durable, longest lasting, & highest quality gas lift cylinders. Cheaper options can start sinking within the first few months of use. Our's don't. They can even support up to 1000 lbs without fail. 6 YEAR HASSLE-FREE WARRANTY - Our goal is to provide you with the highest quality office chair parts so you can extend the life of your chair. So if for some reason our cylinder fails, leaks, or starts sinking - email us, and we'll send you a brand new one. Our warranty lasts for up to 6 years from your purchase date.