The Goodall by Vanair 12-376 plug-ended jumper cable is 15-feet long for easy access to adisabled vehicle. It is made of 4-gauge welding cable and features anon-reversible plug to ensure proper polarity when connecting into the plug endof a battery connector cable. The clamps are rated at 400 amps making thiscable appropriate for jump starting light to medium duty vehicles. Flexible fine strand copper conductor wire Durable high-grade insulation material resists acid, oil and chemicals 4 gauge welding cable 15 foot long 400 amp clamps on one end 2-4 gauge wire contacts Non reversible plug on one end