Retractable size: total length 263mm, compressed 170mm, hydraulic pressure: 150N. NOTICE: The gas spring can only be used on 150N/15KG objects and it does not need a large force to go up or down. 【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 gas struts 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. 【Installation assured】 The metal mounting plate of this gas strut has a large contact area with the housing and is placed at three points, which makes the installation safer and safer. 【A wide range of applications】 The gas struts are equipped with a variety of screws, which is very convenient to install: these gas struts are suitable for supporting various wooden doors and aluminum door