Good Performance: It uses the pressure difference created by the cross-section of the piston rod to achieve the movement of the piston rod, which can support, cushion, brake, adjust the height, and adjust the angle. 2X Shock Car Lift Strut Support Bar Gas Spring Lift Up Pneumatic Support for Storage Bed Hydraulic Rod Universal Shock Absorber 58cm 580mm 750N The automobile hydraulic rod generates force by compressing the gas in the cylinder, so that every time you open and close, it becomes easy, convenient, and safe. This car support spring stick is made of steel with flexible rubber material, which is quite rigid and has high elasticity, not easy to deform or bend, sturdy structure, high load capacity, completely rust-proof, durable, and can be used for a long time. Strength achieved through powder-coated cylinders and specially treated piston rod surfaces, and at a controlled lifting speed. No more falling or hitting your head. Trunk lift support dampers help hold the trunk when you