Heavy Duty Jumper Booster Cables Commercial Grade Battery 2 Gauge 20ft 600 AMP Extra Heavy Duty Stranded Copper Clad Aluminum Jumper Cables Two (2) gauge cable, constructed of stranded copper clad aluminum wire for strength, flexibility, and kink and break resistance. Twenty (20) foot extended length for easy side by side and back to front use 600 amp parrot jaw clamps with high tension springs, constructed of zinc plated steel, with copper plated serrated jaws for improved conductivity, and red and black color coded vinyl grips. Works with top and side battery post terminals