1 piece compact version adapter for L6-20 plug charge from 10-30 240V outlet. Molded with electroplated copper terminal in order to avoid surface oxidation effectively. Dryer 30 AMP 3 prong NEMA 10-30 250V 3-prong male plug. Twist lock 3-prong 20 amp 250 volt L6-20 female. Used 12AWG conductor inner wire, support max 20 AMP loading. Heavy-duty 100% copper wire conductor inside.