Cable Matters Outdoor Rated 12 AWG Heavy Duty 20 Amp Extension Cord 25 ft Power Cable with LED Light (NEMA 5-20P to NEMA 5-20R) - Amazon.com
AC WORKS NEMA 6-20 20A 250V 25-ft 10 / 3-Prong Indoor/Outdoor Soow Super Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
6-Ft 12AWG Nema 6-20P Extension Cord 20 Amp Nema 6-20 Heavy Duty Extension Cord 6Ft,Nema 6-20P to 6-15R/20R,6-20P to 5-20R 20AMP T-Blade Adapter-Cable, 250V 20A AC Extension Cord - Yahoo Shopping