Feature●Diameter Tol. +/-.008". H04 (Full Hard). With 99.99% copper content resulting in superior electrical conductivity. Use it in electrical applications, such as coaxial cables and terminal lugs. Also known as OFE and OFHC copper.●101 Copper Round Rod .500" Diameter x 3 Foot LengthDescription 101 Copper Round Rod, .500" Diameter x 3 Ft. Length