AC Power Splitter 14-30P to 14-30R and 14-50R 250V/7500W. 3FT to 14-30 female; 20FT to the 14-50 female. NEMA 14-30P Plug*1 , 30 AMP 4-prong Dryer male. 3 Feet to NEMA 14-30R Receptacle*1 , 30 AMP 4-prong Dryer female connector. 20 Feet to NEMA 14-50R Receptacle*1 with handle, 50 AMP 4-prong female connector for both RV and EV. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. STW 10AWG/4C cable with molded connectors. 100% copper conductor inside, Heavy-duty AC power dryer adapter cord. NEMA 14-30 Male Plug to 14-30 (3') and 14-50 (20') Female Receptacle. Dryer 4-Prong 30 AMP Y Adapter Cord to Dryer and RV (also for plugin Electrical Vehicle charger). Do not use more than 30 Amp input for this adapter cord. Use on when you have both 14-50 and 14-30 power cord plug, need to plugin a 14-30 power outlet.