【Applicable Models】For Audi A4L (2016–2024). 【Material】This gas spring hydraulic rod is made of high-quality industrial-grade spring steel material, thickened seamless oil cylinder, not easy to rust and deform, high hardness, strong and not easy to break. 【Easy to Install】Based on the original equipment design, this strut damper ensures easy installation. It is a direct replacement for old and damaged devices without modification or drilling and installs in just minutes using simple hand tools. 【Performance】The automotive hydraulic rod generates force by compressing gas in the cylinder, allowing for easy and automatic opening of the liftgate and convenient access to its contents. 【Excellent Service]】Thank you for your attention. For any questions, please feel free to contact us. We will respond and resolve your issue within 24 hours.