High performace combination type 7.5mm copperweld ground rod / electrode

High performace combination type 7.5mm copperweld ground rod / electrode copper weld steel ground rod for anti thunder device Features: 1, unique manufacturing process: the cold rolling hot drawing production process. Do not disconnect, become warped skin, cracking phenomenon 2, prevent corrosion resistance is superior 3, electric performance is better: Surface of copper material high electrical conductivity 4, safe and reliable widely 5, safe and reliable connection 6,