8/3-8/4 or 6/3-6/4 8 Gauge 6 AWG SOOW Cable Wire Cord Portable Power 600V USA | eBay
Iron Box 8/4 SOOW Wire Cord Cable, 10 Foot, Portable Power, 8 Gauge 4 Conductor (10 ft). Heavy-Duty, Flexible, and Durable, Water and Oil Resistant, Ideal for Generators, Circuits, and Data Centers:
WindyNation 5 ft. 8/4 8-Gauge 4 Conductor 600-Volt Black SOOW Cord 8G-4C-SOOW-5F - The Home Depot