1.UL approved ,meet standard like CE, BS7430. 2.Widely export to American countries. 3.Any size is available Copper Coated Earth Rods.GRD copper bonded earth rods meet all the requirements of the worlds most rigorous standards, like UL-467 and ANSI C-33-8. Carbon steel core coated with an electrolytic copper layer, which is minimum 99, 9% pure with no traces of zinc. The copper layer is bonded to ...