DTB-3012-500 - 12 AWG 30 mil Solid Copper Blue Tracer Wire - 500 ft RollCopperhead DTB 3012 500 12 AWG 30 mil Solid Copper Blue Tracer Wire 500 ft Roll The Copperhead DTB 3012 500 Tracer Wire is a high quality locating wire designed for underground utility installations. Featuring a solid 12 AWG copper conductor and durable 30 mil high density polyethylene (HDPE) insulation, this tracer wire provides excellent conductivity and long term corrosion resistance. The blue jacket identifies potable water applications and