The GoodAll 14-254 commercial booster cables are 25-ft. long and made of 4-gauge all copper wire. The cable has a twin extruded jacket for durability, and remains flexible to -40ºF. The clamps are vinyl coated to prevent shorts, and feature replaceable jaws to ensure the long life of the jumper cable set. Rated at 400 amps, these jumper cables are appropriate for light to medium duty boosting. Individually boxed.