Copper futures drive the price of brass, bronze, and electrical copper.
About 110|Electrolytic tough pitch copper, same as C110. See C110 for details. 99.9% pure copper with 101% IACS conductivity, the standard for bus bars and electrical connectors.
About Round Bar|The default starting stock for lathe work. It gets turned, bored, and parted into shafts, pins, bushings, spacers, and just about anything round.