Amazon.com: pizety T Blade 20 amp 100 ft Extension Cord t Blade Extension Cord 10/3 Triple Outlet NEMA 5-20 amp Extension Cord 125 Volts 2500 Watts Extension Cord 10 Gauge T Blade
12AWG Heavy Duty Extender AC Plug Adapter [4-in-1], 15 Amp Household to 20 Amp
AC WORKS 25 ft. 15/20 Amp 12/3 Household Outdoor Extension Cord 15/20AEX-050D - The Home Depot
Amazon.com: 10-Feet (3.0 Meter) 20 Amp-250 Volt Nema 6-20P Extension Cord, 12AWG Nema 6-20 Heavy Duty Extension Cable, Nema 6-15/20R T-Blade Cord with Red Indicator Light, Black Color for Air Conditioner Etc. :
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Southwire 50 ft. 12/3 STW 20-Amp Power Distribution Outdoor Heavy-Duty Twist-Lock Generator Extension Cord 90288802 - The Home Depot
110 volt 20 amp heavy duty outdoor extension cord | eBay