parkworld 25 ft. SJTW 12/3 20 Amp 250-Volt Twist Lock NEMA L6-20 Extension Cord 885651 - The Home Depot
AC WORKS® L5-30 SOOW 10/3 3-Prong Generator Extension Cord – AC Connectors
5-15R 3-Prong Female Receptacle Outlet To Twist Lock L5-20P Male 3-Pin Plug NEMA Electric Power Cord Adapter/Converter 110/125V input 110/125V Output - Amazon.com
Amazon.com: Clear Power 2ft 3 Outlet Generator Extension Cord Adapter with W Splitter, Lighted Ends, 30Amp 3 Prong Twist Lock Plug, Oil, Water & Weather Resistant Flame Retardant, Yellow, DCOC-0136-DC : Tools
30 Amp to 30 Amp 3 Prong Pure Copper Heavy Duty Twist Lock Male Plug 1 – Nilight
Amazon.com : ONETAK NEMA L14-30P to L6-30R 240V 30 Amp Twist Lock 4 Prong Male Plug to Twist Lock 3 Prong Female Outlet Receptacle Generator Welder Dryer EV Charger Power Cord Adapter :
AC WORKS 10ft Super-Duty L5-30 Cord 10-ft 8 / 3-Prong Indoor/Outdoor Soow Super Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.com