[High quality material] aluminum (not sharp), lightweight, lifespan up to 20 years, perfectly supporting solar panels in off-grid installation [Convenient Z bracket for solar mounting system] pre-assembled with bolts, nuts, tapping screws, securing installation, making mounting easier. [Perfect design in solar panel kit] works great with plenty of space (1 inch height) between panel and roof for cooling [Various Uses] A snap to mount solar panels on caravan, motorhome, boats, motorhomes, cabins, sheds, garages, safer and more convenient [Excellent Performance] Sturdy and durable, not easy to bend, work well in hot, cold or humid weather. Color: Silver Material: Aluminum Alloy Package Content: 1*Solar Panel Bracket Only Contents of the above package, other products are not included. The measurement allowed error is +/- 1-3cm.