MASTERY MART Office Chair Gas Cylinder Replacement Kit, 6" Stroke Heavy Duty Hydraulic Pneumatic Piston, 1000 lbs Capacity, Universal Fit for Desk Chairs, Easy Installation with Removal Tool & Gloves

About this item

• ★ Correct Size & Universal Fit – Outer cylinder diameter 2" (50mm), inner piston diameter 1" (28mm), minimum length 11.5" (293mm), maximum length 17.5" (445mm) with a 6" (152mm) adjustable stroke. Fits 99% of office and gaming chairs, including Herman Miller, Steelcase, Secretlab and more.
• ★ Heavy Duty Class 4 Hydraulic Lift – Built with reinforced steel for maximum durability. Supports up to 1000 lbs, ensuring stable, safe, and long‑lasting performance without sinking.
• ★ Easy Installation Kit Included – Comes with removal tool, protective gloves, and step‑by‑step instructions. Even first‑time users can swap the old cylinder and install the new one without special equipment.
• ★ Fix Your Sinking Chair in Minutes – Replace your broken or leaking office chair gas cylinder and restore full height adjustability. Stop struggling with chairs that keep sliding down.
• ★ Save Money & Guaranteed Support – Extend the life of your chair at a fraction of the cost of buying new. Backed by lifetime warranty and responsive customer service – if your cylinder leaks or sinks, we’ll replace it for free.