Ancor Marine Grade Duplex and Triplex Wire Manufactured from individual copper strands and tinned to perform in the harshest marine environments. Ultra-flexible Type 3 stranding resists fatigue from vibration and provides added corrosion protection. Exceeds all UL 1426, US Coast Guard Charter boat (CFR title 46) and ABYC standards Exclusive insulation is rated at 600 Volts.