Iron Box NEMA 25ft 5-20 Extension Power Cord - Durable and Reliable 20A, 125V, UL Listed Portable Generator Cord for Transfer Switches, Data Centers, and Other High-Powered Applications (Black) - Electronics Power
Yellow Jacket 2991 125V 20 Amp 2500W 50 ft. 10/3 SJTW Heavy-Duty Extension Cord with Lighted T-Blade Plug - Walmart.com
Utilitech Outdoor 9-ft 12 / 3-Prong Indoor Spt-3 Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
Extension Cord, 25 ft, 110/120V, 20 amp, NEMA 5-20 Plug/Receptacle | Quick 220 Electrical Systems
parkworld 100 ft. STW 12/3 20 Amp 125-Volt NEMA 5-20 Extension Cord 62244 - The Home Depot
Southwire 50 ft. 10/3 STW 20-Amp Power Distribution Outdoor Heavy-Duty Generator Extension Cord with Power Light Plug 26188802 - The Home Depot
Tripp Lite Power Extension Cord C19 to C20 Heavy Duty 20A 250V 12 AWG 6 ft. 1.83 m Black 20A 12AWG IEC 320 C19 to IEC 320 C20 6 ft. - Office Depot
12/3 Gauge, 3 ft, STW POWER BLOCK, 125V, 20 AMP w/ Lighted Ends Contra
AC WORKS Heavy Duty Durable Extension Cord (10FT NEMA 6-20 W/Multi-Outlets) - Amazon.com
parkworld 25 ft. STW 12/3 20 Amp 125-Volt NEMA 5-20 Extension Cord (NEMA 5-20P to 5-20R) 62220A - The Home Depot
parkworld 6 ft. SJTW 12/3 20 Amp 250-Volt NEMA 6-20 Indoor/Outdoor Extension Cord 885743 - The Home Depot