Epicord RV Adaptors 15A Male to 30A Twist Lock, 12" 10/3 Cord 10/3 Cord 15M30T, 30A/125V Max. Load 3750W, NEMA 5-15P to L5-30R,STW The locking connector has a threaded ring.15 Amp Male Plug To 30 Amp Locking Female For use when RV is equipped with 30 AMP twist lock power inlet and needs to plug into 15 AMP power source Pigtail Adapter.Not applicable to marine application,See label on cord for specific wattage Molded and made of heavy-duty polyvinyl plastic,100% copper wire for reliable conduction flexible and durable.