... advantage Our ground rods have thick copper layer, the averaged thickness is more than 0.25mm; They are strong anti-corrosion ... with different dampness, temperature and PH range. The copper ground rods was lower cost, so they are now ... by the connector,drill and drive. The lenght is 1.5m, 18m, 2.43m, 2.5m, 3.0m ... can be custermized as per customer's requirement. Copper clad steel Ground Electrode