One lot of 4 pieces of copper metal nuggets. 99.995% pure. Total lot weight is 420 grams minimum. The metal is in nugget form with the average piece measuring roughly 1 inch x 1 inch. Each nugget weighs a minimum of 105 grams. Copper is atomic element No. 29 on the periodic table of elements. Used in large amounts by the electrical industry in the form of wire, copper is second only to silver in electrical conductance. Since it resists corrosion from the air, moisture and seawater, copper has been widely used in coins. Although once made nearly entirely from copper, American pennies are now made from zinc that has been coated with copper. Copper is also used to make water pipes and jewelry, as well as and other items. The copper for sale here is extremely high purity, suitable for use in the latest generation of interconnects for today's computer chips and CPUs.