Erico 615840UPC Copper Ground Rod 5/8" x 4'Highlights: Size: 5 8" x 4' Copper plated rod is made up of steel Inside material is magnetic Copper bonded, resists corrosion better than galvanized rods, allowing for a 30 year service life in most soils Uniform plating thickness, average tensile strength of 80,000 psi and straightness tolerance of . 010" per linear foot Exceeds the requirements of ANSI UL 467 1984, CSA, and ANSI NEMA GR 1