Sportsman Series 30 ft. 125-Volt to 250-Volt 50 Amp Marine Type Pigtail Extension Cord - Yellow - Sportsman Generator Cord in the Generator Accessories department at Lowes.com
DuroMax XP5050GC | 50A 50ft 6ga 14-50 CS6364 Heavy Duty Power Cord | Free Shipping
Conntek GIB1450 NEMA 14-50P to CS6364 Cord & 50 Amp Inlet Box Sets
Amazon.com: Generac 6330 10-Foot 50-Amp Generator Cord for Safe and Reliable Power Transfer, Made of Weather Resistant Rubber with Twist-Lock Ends : Patio, Lawn & Garden