Product Description Material is high-quality, high-purity aluminum, an original product from a pure solid flat plate. Aluminum, when compared only by electrical resistance, ranks after silver, copper, and gold, and is superior in electrical conductivity following copper and gold. The resistance values of gold and aluminum are almost the same. Aluminum's resistance is about 1.5 times that of copper. Aluminum is lighter than copper, so on a per-weight basis, it conducts more than twice as much electricity as copper. "I thought aluminum didn't conduct electricity??" It conducts because it's a metal. Aluminum is an element, so it won't conduct electricity if it has impurities, surface treatments, anodizing, or Alpina treatment. Aluminum is also used inside capacitors. ~Accessories & Specs~ Part Number: SA3TBU1-UBL Top 3 holes, M6 specification, with ball bearings. Not tapped. * Mounting section can be selected from M6, M8, or M10. Unichrome up-set bolt and nut x 3 BT mounting flange nut x 1 This product is made with the assumption of being used exclusively for grounding in an earthing tune. Because it has 3 holes, it should be versatile. As this is an original processed product, please consider processing scratches, scuffs, slight dimensional errors, and distortions as part of its charm ^^; * Mounting section can be selected from M6, M8, or M10. If no selection is specified, M6 holes will be shipped. We do not accept price negotiations. No shipping on weekends and holidays. Shipping date will follow the app's guidelines. #EarthingKit #EarthingTerminal #MachinoEarthingShop