Features Compatible with EcoFlow 100W and 400W Rigid Solar Panels. Used to install the Rigid Solar Panels on the rugged flat roof (horizontal or tilted). Not suitable for any corrugated (slate or tiled) roofs An all-black design offers a low-key installation that blends in well with your roof Lightweight and robust, crafted from anti-corrosive, waterproof aluminum alloy, suitable for long-term installation and use. Well-mounted solar panels can withstand a dynamic 2400pa wind pressure load (130mph wind speed) and a static 5400pa snow load (113lb per sq foot of snow). Package includes 4 × M6 hexagon screws, 4 × M6 spring washers, 4 × M6 flat washers, 4 × M6 large flat washers, 4 × M6 flange nuts. Recommended Tools (Not Provided): Adjustable Wrench Tape Measure Safety Glasses Work Gloves *The solar system should be installed, adjusted, and repaired by professional, qualified electrical maintenance personnel who are familiar with the installation structure and operation of solar panel installations.