500 Feet of Black 16 AWG marine grade 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 They are constructed with premium vinyl insulation that 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