Good stability, high safety and explosion protections.Made of stainless steel and ABS , which offers outstanding impact resistant, the solid construction is designed to against corrosion, which is very durable. Suitable for general office chairs, bar chairs, computer chairs. Features -Color:Black-Material:Stainless steel, ABS-Size:39.00X5.00X5.00cm/ 15.33X1.97X1.97in -Note:The tube height of 120# is 22cm-Strengthened stainless steel lifting bar, smooth and silent lifting. Suitable for the most office chairs.- Heavy duty gas lift cylinder can support enormous weight, high center of chair support column.- The length of the chair cylinder can extended to suitable for most of your office chairs, with reliable performance.- Superior performance, exquisite workmanship, safe and reliable. Easy to install without additional screws.- This gas lift is suitable for most executive office chairs, work chairs, office chairs, rolling stools, drawing stools.Packing list: 1 x Gas Lift Cylinder