6 AWG Battery Cable 3FT 6 Gauge Pure Copper Battery Inverter Cables with 5/16 in Lugs Both Ends Power Inverter Wire Set for Automotive Solar Power Inverter Marine Boat RV Car Motorcycle (3FT). 【High Quality】battery cables are made of pure copper and tinned copper lugs with superior corrosion and oxidation resistance, which improves the oxidation resistance of copper and maintains its conductivity.