GREEN Copper clad steel earth rods are made of molecularly bonded 99.9% pure electrolytic copper onto a low carbon steel core. The steel core is a bar drawn to the required diameter. GREEN rods are highly resistant to corrosion, and because the steel used has a high tensile strength 600 N/mm², they can be driven by vibrohammers to great depths. The copper jacket is 0.300 mm thick at all points and it ensures a life expectancy of greater than 30 years.