Ancor Marine Tinned Copper Wire. Manufactured from tin coated copper strands for maximum protection against corrosion and electrolysis. Resists fatigue due to vibration and flexing. Premium vinyl insulation is rated at 600 volts, 105 deg C dry and 75 deg C wet, stays flexible even in extreme cold (-40 deg F/C) and resists salt water, battery acid, oil, gasoline, heat, abrasion, and ultra-violet radiation. Exceeds all UL1426, US Coast Guard Charter boat (CFR title 46) and ABYC standards.