Premium Material: The Z solar panel mounting brackets are made of excellent high-strength aluminum alloy material, corrosion-resistant, rust-proof and durable. Easy to Install: The surface is pre-drilled, easy to fix with the provided screws and nuts, and the installation is convenient and simple, without other tools. Z Bracket Design: The ventilated Z shape with an extra edge is exactly what you need to protect the solar panel battery. Easy to use and perfect for uneven surfaces. Wide Applications: Ideal for mounting solar panels. Suitable for mounting on caravan, trailer, boat, motorhome or yacht, etc. Package Content: You will receive 4 sets of solar panel mounting brackets for mounting solar panels with mounting nuts and bolts, which provide better support for solar panels and no burden on the roof.