Mastery Mart Gas Cylinder Replacement, with 251mm - 346mm gas cylinder for office chair, gloves, cylinder removal tool, cylinder clamp shafts (28mm), long screws, L screwdriver.

["Adjustable height of 100 mm"] The minimum height of the fully compressed chair piston is 251 mm, the fully extended height is 346 mm, and it has an adjustable height of 100 mm, allowing you to sit higher. (Note: measure before purchasing) ["Universal fit for most chairs"] The outer diameter of the cylinder connected to the base is 50 mm, and the inner diameter of the gas lift connected to the chair is 28 mm. This pneumatic pistol cylinder fits almost any office chair on the market, including Herman Miller Aeron. Please confirm these measurements before purchasing. ["Upgraded Class 4 gas cylinder"] The replacement gas cylinder for office chairs from Mastery Mart is made of high-quality steel. This sturdy gas lift cylinder is manufactured to the highest industry standards (BIFMA/ANSI) and has a maximum weight capacity of up to 450 kg. ["Easy removal and installation"] The only replacement chair cylinder on Amazon that offers a cylinder removal tool. No more struggling and spending hours removing the old, defective cylinder of your chair with tools you don't have. We also make sure to assist you if needed. ["100% satisfaction guaranteed"] If you encounter any issues with using our replacement gas cylinder for chairs, please do not hesitate to contact us. We are here to provide guidance, offer replacement parts, or process refunds, depending on your specific case. Your satisfaction is our top priority.