... its tensile strength, the outer surface of which is plated with 99.9% pure copper. Copper thickness of 10mil, 13mil, 5mil, 1mil, 2mil ... is solid with strong anticorrosive feature and high electrical conductivity performance. Copper layer does not crack, not peel or split when ... the inception, our factory is specialized in the production of copper bonded ground rods and we have been the main supplier ...