Description 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:Silver-Material:Stainless steel, ABS-Size:55.00X5.00X5.00cm/21.61X1.97X1.97in-Note:The tube height of 200# is 30cm-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