Road Powers 4 Gauge Copper Clad Aluminum 20 Ft. BoosterCable is a heavier duty booster cable. It provides 250% of the power level provided by our 10 Gauge booster cables. It is ideal for SUVs and trucks. The 87600108 Booster Cable is designed to be used with 6-12 Volt batteries and features rugged steel parrot jaw clamps with copper-clad jaws and non-slip vinyl-coated grips. These booster cables feature a triple polarity system, and are color coated with glow-in-the-dark labels to help identify negative and positive cables. Featuring a water, chemical, and temperature resistant T-Prene jacket for protection. The 87600108 4 Gauge 20 Ft. Booster Cable comes with an 1-year limited warranty.