Retractable size: total length 263 mm, compressed 170 mm, hydraulic pressure: 150N. NOTICE: The gas spring can only be used on 150N / 15KG objects and it does not need a large force to rise or fall. 【Good damping effect】 The piston cylinder of the gas spring is connected to the connecting rod, which has a high load force and hydraulic fixation. The entire installation process of the gas springs provides excellent cushioning and sealing. 【Stable and Safe】 The gas piston cylinder is filled with inert gas - nitrogen, which has a strong compressive capacity, making the installation process more stable and safer. 【Safe Installation】 The metal mounting plate of this gas spring has a large contact area with the housing and is placed at three points, making the installation safer and more secure. 【Wide Range of Applications】 The gas springs are equipped with a variety of screws, which is very convenient to install: these gas springs are suitable for supporting various wooden doors and