This line of premium battery cables features tinned copper stranding for maximum protection against corrosion and electrolysis. The ultra flexible stranding resists fatigue due to vibration and flexing, and the premium vinyl insulation resists attack by salt water, battery acid, oil, gas, and UV light. The battery lugs are made of high grade tinned plated and UL rated with dual walled shrink tubing for water-resistant design. Exceeds all UL 1426, USCG charterboat, CSA, and ABYC standards and is rated at 600V. Water-resistant design | 4-Gauge Black Battery Cable, 36" size 036