AC WORKS® 15/20 Amp 12/3 Household Indoor/Outdoor Extension Cord – AC Connectors
20 Pack 10/3 200ft Black Heavy Duty 15 Amp, 300 Volt, 1875 W Lighted Extension Cord
Amazon.com: Parkworld NEMA 5-20 Extension Cord 5-20P to 5-20R (T Blade Female Also for 5-15R Adapter) 125V, 20A, 2500W (10FT) : Tools & Home Improvement
Amazon.com: 1-FT 15 Amp Household AC Plug to 20 Amp T Blade Adapter Cable 12AWG Nema 5-15P to 5-20R,5-15P to 6-15R/20R 20-Amp to 15-Amp Plug-Adapter Cord,Heavy Duty 15A 125V to 20A 250V
Extension Cords Buying Guide at Menards®
12AWG Heavy Duty Extender AC Plug Adapter [4-in-1], 15 Amp Household to 20 Amp