The Goodall by Vanair 14-203 commercial booster cables are 20 foot long and made of4-gauge all copper wire. The cable has a twin extruded jacket for durabilityand remains flexible to -40°F. The parrot type clamps are equipped with aheavy duty spring. Rated at 450 amps these jumper cables are appropriate forup to light to medium duty boosting. Twin extruded jacket 20 foot Cable Up to -40° F Replaceable jaws all copper wire 450 Amps Heavy Duty Spring Parrot type Clamps American Wire Gauge Rated
