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Ryerson offers 101 copper round bar, known for its enhanced electrical conductivity and is often used in the manufacturing of semiconductors, super conductors and particle accelerators, while 102 oxygen free copper round is often used in bus conductors, appliances, microwave tubes and wave guides. Copper 110, commonly known as electrolytic tough pitch (ETP) alloy, is valued for electrical conductivity and formability and is used in electrical components and other applications.