Feature:Easy to install with simple hand tools in just few minutes.Made of good quality,durable and strong support for long time use.A good replacement for the borken lift support struts.Do not compress them by hands before installation, the struts could only be compressed after installing successfully. After installation, the lid/cover would be opened or closed smoothly.Specification:Material: MetalColor: BlackPressure:300N / 66LbsTotal Length: 62cm /24.41''Extended Length: 60cm / 23.62''Compressed Length: 34.5cm /13.58"Housing Diameter: 18mm / 0.71''Connecting Rod Diameter: 8mm / 0.31"Hole Size: 10mm / 0.39''Note:If the temperature is lower than minus 20 degrees, the oil density of gas spring turn high (frozen) and it is difficult to press down.Package Included:1 x Gas Struts1 x Metal Flat Head