4ga black tinned wire per ft

Seachoice 63028 Tinned Copper Marine Wire, 4 AWG, Black, 

Long-lasting and rugged - exceed UL 1426, ABYC and USCG standards

• Premium vinyl insulation rated at 600 volts, 105°C dry and 75°C wet
• Stays flexible even in extreme cold (-40°F/C)
• Resists salt water, battery acid, oil, gasoline, heat, abrasion and UV radiation
• Highest quality, ultra-flexible (Type 3) tinned copper stranding provides maximum protection against corrosion and electrolysis while resisting fatigue due to vibration and flexing