Model Number: LH225 Key Specifications/Special Features: Nom diameter: 5/8"Core diameter: 14.2mmLength: 2.4mWeight: 3kgCopper bonded ground rod adopts high quality low carbon steel Q235 as core, plated pure copper at surface of steel, there has ven and perfect plating, rod could be bent 180 degrees, no crack, no break off, thread is made by special die, also covered with copper completelyMost outstanding feature of our ground rod is that both ends (traverse sections) are covered with copper, no steel exposure to soil, so that prolong the service life of rod greatlyThey stand among the best of the similar products in the world market