Features 1. Material: Z-Brackets made of rust-free anodized aluminum alloy, bolts, nuts and washers are stainless steel. 2. Functions: Solar Panel Z-Bracket Mounting Kit makes it easy to mount solar panels to recreational vehicles (RV's), boats, cabins or anywhere else where you need a simple yet reliable method to mount solar panels. 3. Package: Includes 4pcs anodized aluminum Z-Brackets , 8pcs stainless Steel bolts and k-lock nuts. 4. Good Choice: This product is a good choice for flat mounted systems on flat or curved roofs. Compatable with all roof types and solar modules. 5. These brackets are a breeze to install – easy, fast, solid, and strong. All you'll need is one look and it'll all come together easily. Specification Material: Aluminum alloy Color: White Size: 3 x 6 x 5 cm Weight: 180 g Package Include: 4x Solar Panel Z-Bracket 8x Bolts 8x Nuts