parkworld 1.5 ft. STW 6/3+8/1 RV/Marine 50 Amp 125/250-Volt NEMA 14-50P Straight Plug to Twist Lock SS2-50R Generator Power Cord 63043 - The Home Depot
AC WORKS® Marine Shore Power 6/4 SOOW NEMA SS2-50 50A 125/250V Marine – AC Connectors
ParkPower 25 ft. Length 50 Amp 125/250-Volt Extension Power Cord with Handle 50ARVE25 - The Home Depot