This gas lift cylinder fits most executive chairs and stools. The gas lift cylinder is made of sturdy ABS and stainless steel material and will not be deformed after long-term use. The height of the chair piston can expanded, which allows you to rise higher. Features -Color:Black -Material:Stainless steel, ABS -Size: 31.50X5.00X5.00cm/12.38X1.97X1.97in -Note:The tube height of 100# is 20cm -Note: The accessory's color is random -Explosion-proof lift cylinder, smooth and rotation in all directions, full 360 degree rotation. -The gas lift cylinder has fine workmanship. Suitable for most office chairs, administrative and computer chairs. -The gas lift cylinder can be adjusted in height, allowing you to lift higher and use your office chair in more situations. -This hydraulic piston has a better load-bearing capacity, which is much heavier than ordinary gas cylinder for office chair. -Reliable performance gas lift cylinder, withstand higher weight and pressure, high safety and explosion-proof. Package list: 1 x Gas Lift Cylinder