AC WORKS 25 ft. STW 8/3 3-Prong NEMA 6-50 Welder Extension Cord WD650PR-25D - The Home Depot
Airgas - RAD64059535 - RADNOR™ 25' 40 A/300 V PVC Jacket Black Extension Cord
VEVOR RV Extension Cord 40 Amp 50 ft. 250V 8 AWG/3C Welder Power Cord with NEMA 6-50 Plug STW Jacket for Welding RV Generator HJLJQ8-3-50FTYCX1V1 - The Home Depot
parkworld 15 ft. 8/3 40 Amp 250-Volt Heavy-Duty NEMA 6-50 Welder Extension Cord 886627 - The Home Depot
iMeshbean® Welder Extension Power Cord 25/50 FT 220 Volt 50 Amp 8/3 NEMA 6-50P for MIG TIG Plasma Welding Heavy Duty (Welder Adapter 14-50P 50A 4-Prong Plug to 6-50R with Handle) - Amazon.com