Amazon.com: CircleCord UL Listed 4 Prong 10 Feet Dryer/EV Extension Cord, 30 Amp NEMA 14-30P/R, Suit for Level 2 EV Charging Such as Tesla Model 3/X/Y/S and 4 Prong Dryer, 125V/250V STW
Welder Extension Cord Extension Cord 25' 220 Volt 50 Amp Heavy Duty 8/3 MIG TIG Plasma
AC WORKS 10 ft. STW 10/3 NEMA 10-30 3-Prong 30 Amp Heavy Duty Thick Dryer Extension Cord 1030PR-010 - The Home Depot
AC WORKS® [L1530PR] SOOW 10/4 NEMA L15-30 30A 3-Phase 250V Industrial – AC Connectors
30A NEMA TT-30 RV Extension Power Cord | 10 AWG | Ceptics
Power Cord Adapter; Mighty Cord ™; 4 Prong To Two 30 Amp Female; 30 Am – The RV Parts House