1、The initial spring force of 1500 series nitrogen gas spring is 15000N, which is small in size and long in working stroke. 2、The cylinder body has a C shape notch on the upper and a U shape notch on the bottom with M8 screw holes, which is easy to install. 3、There is a inflation port on the side of the gas spring cylinder, which can be used for pipe connection system. 4、The piston rod has a high hardness after a special process of fine processing, and the surface roughness reaches about Ra0.02um. 5、Made of alloy material and adopts integral cutting and forming process, which is safer and more reliable than pipe welding. 1 x Nitrogen Gas Spring1 x Storage Box Item Type: Nitrogen Gas SpringMaterial: AlloyPurpose: Die compression nitrogen cylinderCylinder Diameter: Approx. 63.2mm / 2.5inPlunger Diameter: Approx. 36mm / 1.4in