Copper bonded earthing rods come in a variety of standard sizes and lengths, making them perfect for different grounding needs in residential, commercial, and industrial projects. You’ll typically find standard diameters like 9.5 mm (3/8"), 12.5 mm (1/2"), 14.2 mm (5/8"), 16 mm, 17.2 mm (3/4"), 20 mm, and even up to 25 mm for those heavy-duty jobs. As for lengths, they usually range f... https://www.pioneerpowers.com/copper-bonded-earth-rod.php