parkworld 30 ft. STW 6/3 Plus 8/1 UL Listed Heavy-Duty RV/Generator NEMA 14- 60 ExtensionCord 14-60P Male Plug to 14-60R Receptacle 885835 - The Home Depot
Masterplug 60 ft. 14/3 Wire Gauge General Purpose Indoor/Outdoor Grey/Green Extension Cord Reel with 4-Outlets 3852290 - The Home Depot
AC WORKS 15ft NEMA 14-50P to CS6364 15-ft 6/4-Prong Indoor/Outdoor Stw Heavy Duty Appliance Extension Cord in the Extension Cords department at Lowes.com