UL 1426 wire is required by the US Coast Guard for all boat wiring and is verified through inspection High strand count tinned copper conductor (Type III) for low resistance, high conductivity and protection from corrosion High grade PVC insulation resists moisture, flame, acid, alkali, oil and gasoline Meets SAE, ABYC, UL and Coast Guard requirements, 600 volts, 105°C dry, 75°C wet Common Sense Marine