Made of aluminum alloy AL6005-T5 material, with surface treatment, it has high corrosion resistance, harder strength, and convenient and fast installation. 1. First, place the rubber pad and mini guide rail on the colored steel tile to fix them 2. Fix the self tapping screw on the colored steel tile 3. Place the solar panel on the mini guide rail 4. Fix the pressure measurement on the solar panel Color: As Shown Material: aluminium alloy Package Contents: 1 x 30cm MiNi Rail Solar Bracket kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.