Molded with electroplated copper terminal in order to avoid surface oxidation effectively. 100% copper wire conductor inside, used STW 10 AWG cable support max 30 Amp loading. Shore power adapter cord L14-30P to CS6364 125V/250V Generator to Transfer Switch 50 Amp Inlet Box Adapter (L14-30 30Amp 4-Prong to CS6364) CA Standard twist lock female CS6364 connector with locking ring and seal ring for generator 50A inlet box , extension cord , generator outlet. Heavy-duty power adapter cord for RV / Marine / Generator Color: Yellow Length: 3 FT, 10 FT, 20 FT