Male Plug: 50 Amp NEMA 6-50P 125/250 Volt for welder plug, ETL Listed Female Connector: 50 Amp NEMA 14-50R 125/250 Volt compatible with Tesla Heavy Duty: Molded plug, copper wiring coated, heavy duty flame retardant, UV resistant, 6 gauge STW indoor/outdoor water resistant jacket Better Than DIY: This is cheaper than building yourself, molded plug more safe than assembly plug, better than DIY Note: This Adapter is only for EV Charging, it cannot be applied to RV or Welder (NO RV or Welder). Please confirm your needs clearly before making a purchase. If you have any questions, please contact us to get service. CircleCord Charger Adapter Cord