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The details of products : Our company is a professional manufacuter copper grounding rods, using high-quality low-carbon steel core Q235, foreign-plated 99.9% pure copper production process, thus ensuring the copper layer and steel core molecular link between the permanent. With good conductivity, corrosion resistance and higher tensile strength. Technical parameters: (1) The copper layer thickness: ≥ 0.25mm (2) resistivity: ≤ 0.059Ωmm " (3) Tensile strength: ≥ 500N/mm (4) Corrosion resistance: the concentration of 10% nitric acid solution soak for more than 90 hours, no corrosion weight loss ≥ 15% (5) The copper layer adhesion: Continuous temperature over 300 up to 1 hour after the quenching, copper layer does not peel off. (6) The copper layer plasticity: The copper grounding rods bent 180 °, copper layer without cracks, without shedding phenomenon.