Ancor Marine Grade Electrical Wire. Triplex Cable 6/3 AWG, Flat, 50' Spool. Exceeds UL 1426, ABYC, & US Coast Guard Charter Boat (CFR 46) standards. Constructed with premium vinyl insulation rate at 600V, 105 degrees Celsisus Dry, & 75 degrees Celsius Wet. Stayes flexible in extreme cold (up to -40 degree F/C). Resists saltwater, battery acid, oil, gasoline, heat, abrasion and ultra-violet radiation. Type 3 tinned coper stranding provides maximum protection against corrosion and electrolysis while resisting fatigue due to vibration and flexing.