parkworld brand, #691739, Compact Locking Adapter RV/Marine Generator 50 Amp 125-Volt/250-Volt NEMA 14-50P to SS2-50R. It has a RV/EV/Generator 50 Amp 125-Volt/250-Volt 4-Prong Straight Blade NEMA 14-50P male plug and a Marine Shore Power 50 Amp 125-Volt/250-Volt Twist Locking SS2-50R female receptacle. Durable and Compact Design, fully molded allows a comfortable firm grip and easy connection.
NEMA 14-50P to SS2-50R power adapter
Plug: NEMA 14-50P RV/Generator 50 Amp 125/250-Volt male plug
Receptacle: NEMA SS2-50R 50 Amp 125-Volt/250-Volt locking female receptacle
Maximum operating power of 50 Amp, 250-Volt, 12,500-Watt