35-40mm Adjustable End Clamp: Featuring an adjustable end clamp design, the VEVOR solar panel mounting brackets can be easily adjusted to accommodate different solar panels thicknesses. It is suitable for framed solar panels ranging from 1.38 to 1.57 inch (35 to 40 mm). Durable Construction: Made from durable aluminum alloy with anodized surface treatment, the solar panel mounting brackets provide excellent corrosion, rust and weather resistance. Lightweight design also facilitates easy installation and transportation, making them ideal for various outdoor applications. Easy Installation: This solar panel mounting kit comes with 10 guide rails (4-inch), 4 end clamps, 6 mild clamps, a set of accessories and detailed instruction manual, ensuring a quick installation. Users can easily set it up and enjoy stable, reliable support for solar power system. Suitable for Various Roofs: This adjustable solar panel mounting bracket is compatible with various roofs, including wood, metal, concrete, tile and more. It provides stable mounting, ensures long-lasting performance, and enhances the overall efficiency of your solar power system. Why Choose US: Our solar panel mounting system not only improves energy efficiency but also enhances panel heat dissipation, prolonging the lifespan of your solar panels. With long-term stable mounting and free maintenance, you can enjoy a hassle-free, efficient solar power system.