Generator Adapter L5-20P to generator twist lock L14-20R 125V/2500W. Generator Locking 3-prong 20A L5-20 male plug. Generator Locking 4-prong 20A L14-20 female receptacle. Connect a Locking 20 AMP 3 prong L5-20 plug to Twist Lock 30 AMP 4 prong L14-30 adapter, Heavy-duty round power adapter plug for generator. 1 piece AC adapter molded PVC with 100% copper conductor inside, Test by UL & cUL standard.