Shop Nilight EV Dryer Adapter Cord 30 Amp to 30Amp 4 Prong 125V/250V 7500 Watt Pure Copper Dryers New Outlet Old Plug Conversion Heavy Duty 10 Gauge Wires 14-30P 10-30R 30M/30F in high quality, support 2 year warranty. Constructed with 100% pure copper with full 10 gauge wires ensuring high conductivity. The wires are stranded copper, it’s very flexible and the STW jacket is very durable. The jacket is coated with a heavy-duty flame retardant, heat resilient PVC sheath that serves as protection from the outdoor elements, wear and tear.