Conntek P1430650 Welder Adapter 4 Prong Dryer 14-30P Plug to NEMA 6-50R 50 Amp 250-volt Adapter Cord NEMA 14-30P 4Prong Dryer Plug 50A NEMA 6-50R welder Female Socket 50Amp Welder Adapter Working length 1.5 feet Assembled in the USA