Electricity cast copper ground rod of our company with special electricity,99.9% of the pure copper is covered evenly on the low carbon steel core,thick to have copper layer(Above 0.25mm). It is equal to degrees of good ,person who strip characteristic to glue.Its advantage is that the tensile strength is big(up to 600N/MM2),it is strong to able to bear corrosivity (can fuarantee service life is in abobe 50 years),there are invariable low resistance and good plasticity,three is the same conductive perform ance as copper that has a steel characteristic concurrently.