GR6258 GROUND ROD, 5/8" X 8' GALV | Zinc-coated exteriors are hot-dip galvanized for solid protection against corrosion in accordance with ASTM specification A153-78. Surfaces are rigidly inspected to eliminate seams, slivers and other defects. Meet EEI-NEMA TDJ-30 and are REA listed. 15 year service life in most soils. Galvanized plated steel.