Amazon.com: Parkworld Welder 50A Extension Cord, Welding 3-Prong NEMA 6-50 Extension Cord (50FT) : Tools & Home Improvement
Westinghouse 25 ft. Generator Cord: 50 Amp 120/240-Volt 14-50P to 14-50R 5027825C - The Home Depot
SMJ Extension Lead 240 Volt 4 Way 13A 5 Metre - SMJB4W5MP
Amazon.com: GearIT 50 Amp RV/EV Extension Cord (75 ft) 4-Prong 250-Volt, Compatible with Tesla Model 3/S/X/Y Mobile Charger, NEMA 14-50P to 14-50R 6/3+8/1 STW AWG Gauge Outdoor Waterproof Power Cable - 75