100% copper conductor inside, Heavy-duty AC power adapter cord for generator. RV Adapter cord L14-30P to 14-50R 125V/250V, Used (4)10AWG stranded copper inner wire, support max 30 Amp loading. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. Generator 4-prong 30 AMP locking male plug. RV 4-prong 50AMP right angle. female with lighted and handle, easy to pull and push. Color: Black.