Feature: Strength: 100lb/445N (per strut), 2 struts is 200lb/890N. It can hold 100lbs open individually or together for about 200lbs on any object such as car cover, RV, which is universal. Easy Installation: We have a quick installation guide for you. If you have any questions about the strut strength or any other questions, please contact us before purchasing, we will provide you with professional advice. Note: Do not compress them by hand before installation, the struts can only be compressed. after installation successfully.After installation, the cover/lid would be opened or closed smoothly.Working Temperature: -25degree Celsius to 70degree Celsius. Specification: Material: Metal Color: Black Pressure: 445N/100Lbs Extended Length: 50cm/20 Compressed Length: 30.7cm/12.09 Overall Length: 51.5cm/20.28 Rod Length: 19.3cm / 7.6 Housing Diameter: 18mm / 0.71 Connecting Rod Diameter: 8mm / 0.31 Thread Dimension: M8x1.25 Seal Hole Diameter: 8mm / 0.31 Gasket Hole Size: 10x8mm /