Package contents: The package contains 12 packs of solar panel center terminals, enough quantity to cover your daily use and replacement needs and provide you with much convenienceLightweight and sturdy: these plate clamps are made of High quality aluminum, the surface is made of fine manufacturing process, not easy to rust or corrode. Unlike stainless steel solar brackets, the corrosion-free aluminum alloy bracket is lighter, but stronger, better support for solar panels and no load on the roof.Practical Tools: These aluminum solar panel center clamps are designed to fix the modules to the rails and make the connection between the modules stable. Perfect for irregular surfaces. The mounting Z brackets are very strong and durable, making the brackets not easy to bend. Easy Installation: These solar panel terminals ensure a solid connection between modules. You can simply mount them at your destination and save time and effort during installationWidely used: Z Brackets kit makes it easy to mount solar panels on RVs, boats, campers, cabins or anywhere you need a simple but reliable method for mounting solar panels.