Antlu 14" to 22" (8" Stroke) Adjustable Gas Lift Cylinder for Office Chair Stool Replacement, Tall Hydraulic Pneumatic Cylinder Shock Piston for More Scenes, Universal Size Heavy Duty (400 lbs)

Heavy-duty: This gas lift cylinder is made of thicker alloy steel, engraved with the mark of SGS inspection, the quality is reliable. (Weight capacity: 400 lbs)
Adjustable height: The height of the gas lift cylinder fully compressed is: 14 ", and the height fully expanded is: 22". This means that it has an 8-inch adjustable height that allows you to rise higher and use your office chair in more scenarios.
Universal size: This 8" Long Stroke Gas Lift suitable for most executive office chairs, task chair, office chair, rolling stool, drafting stool. ( Please measure dimensions before you purchase it )
Easy to install: Usually you may need to use a hammer to take out the old gas lift cylinder and replace it with a new one. (We suggest you search for "gas lift replacement" on youtube for instructions)
5 Year Warranty: If our lift cylinder fails, leaks or begins to sink, please email us and we will send you a brand new cylinder.