AC WORKS® 20A T-blade Outdoor SJTW 12/3 Anti-Cold Weather Extension – AC Connectors
AC WORKS 20A NEMA 5-20 50-ft 10 / 3-Prong Indoor/Outdoor Soow Super Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
parkworld 16 ft. STW 12/3 20 Amp 125-Volt NEMA 5-20 Extension Cord 62213 - The Home Depot
NEMA 5-20 Cords
C19 to 5 20P Heavy Duty Extension Cord, 10 ft, Black | Eaton
Generator Power Cord Marine Shore Power Trailer Cord RV Generator Adapter - Conntek. 5-20 125V Extension Cords - 25ft
1-Foot Nema 5-20P Extension Cord, 12AWG Nema 5-20P to 5-20R Extension Power Cable,20Amp T Blade Male to Female Cable, Nema 5-20P to 5-15/20R Comb Adapter Cable: Amazon.co.uk: DIY & Tools