100' 4/0 AWG Welding Cable Flexible USA Power Black Specifications Size AWG: 4/0 Nominal Stranding Class K: 2065/30 Nominal Resistance of Conductor at 25C /1000 Ft.: 0.0530 Nominal Thickness of Insulation (Inches): 0.079 Nominal O.D. (Inches) : 0.716