Office chair cylinder, gas cylinder resistant, silent, gas lift, office chair spare parts Description: [material]: office chair gas lifting cylinder made of high quality 50 mm seamless pipe, strong and durable, can be used for a long time [adjustable]: the hydraulic/pneumatic piston of the gas lifter of the swivel chair is adjustable in height. [convenient use]: gas lift cylinder replacement is easy and convenient to install and use. [replaceable accessories]: the gas cylinder of the matching chair can be good for the accessories of your old or broken chair [applicable]: desk chair cylinder suitable for office chairs, game chairs, hairdressers, swivel chairs, etc. Letter size: 125 mm height: 27.7 cm-39.4 cm/ 10.91 inches 210 mm height: 34.5 cm-54.7 cm/ 13.58 inches 100 mm height: 25.7 cm-34.9 cm/ 10.12 inches - 13.74 inches The package includes: 1 gas lifting cylinder Note: Allow for slight errors due to manual measurement and different monitors.