Siberia macpherson struts and cartridges not only control the impulses applied by the spring but also maintain the correct wheel position and function within the suspension system to bear the effects transmitted by the wheel. In order to achieve the double functions of higher performance and better dimensional robustness, the struts and cartridges are ensured to be manufactured with high quality and high mechanical property materials. The nitrogen gas charged struts and cartridges are developed with advanced technologies and provied passengers excellent road control and superior steering experience. The pressurized gas prevents air bubbing in the hydraulically fluid or vacuum working cylinder environment, which provides smoother oil flow inside the oil reservoir and maximum ground adherence and in turn, improves the vehicle stability and longer durability for both struts/cartridges and tires.