Black 6 Gauge Battery Cable With Lug On is made from 49 strands of true 22.5 gauge copper conductor wire covered in a durable, high temperature resistant Black PVC insulation with a nominal outside diameter of 0.330 inches. Rated for use up to 60 volts, the 22.5 gauge copper stranding is highly conductive maximizing current flow while still being flexible. Ideal for connecting batteries, starters, amplifiers, and for solar use.