6/3 SOOW SOO SO Black Rubber Cord Outdoor Wire Cable Flexible Wire/Cable - Wire Wire Electric Supply
Southwire 100 ft. 6/3 600-Volt CU Black Flexible Portable Power SOOW Cord 55809243 - The Home Depot
GearIT 6/3 6 AWG Portable Power Cable (25 Feet - 3 Conductor) SOOW 600V 6 Gauge Electric Wire for Motor Leads, Portable lights, Battery Chargers, Stage Lights and Machinery -25ft Electrical Cord - Walmart.com
TEMCo SOO035 SO Cable - 6/3 - 150 ft - Made in USA - SOOW - TEMCo Industrial
AC WORKS NEMA 6-20 20A 250V 50-ft 10 / 3-Prong Indoor/Outdoor Soow Super Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com