Amazon.com: Cable Matters 4 Prong 50 AMP RV Adapter Cable 25 ft (Generator Extension Cord/Generator Power Cord, 50 AMP Twist Lock Adapter, 50 AMP RV Cable) - 25 Feet (NEMA 14-50P to NEMA SS2-50R) : Automotive
VEVOR 15 ft. 6/3 plus 8/1 Extension Cord Indoor/Outdoor Generator Power Cord STW 50 Amp 4-Prong UL Listed No-pin Type FDJYCX15FTX50AWCZV1 - The Home Depot