500 amp Jumper cable is must have for any car and truck. jumper cable is use to start dead battery vehicle. The booster cables are insulated with T Prene coating which is designed to remain flexible down to minus 94 degrees Fahrenheit. For gauge heavy duty cable.The 4 gauge heavy duty cables are the strongest consumer grade available and they resist motor oil rain and chemicals for dependable use.How To Use Jumper Cable. 1. Position another car near yours so that the batteries are close, but ..