THHN Building Wire, Heat, Moisture, Gasoline and Oil Resistant;SIMpull(R) Technology for Easier Pulling Additional Information, Commercial;Industrial Application, Brown, Copper Conductor Material, 4 AWG Conductor Size, 100 A (90°C);70 A (60°C);85 A (75°C) Current Rating, PVC Insulation Material, 40 mil Insulation Thickness, Nylon Jacket Material, Made in USA, +90 °C Maximum Operating Temperature, 19 - Strands, 318 mil Outside Diameter, Reel;Spool Package Type, CSA C22.2 No. 75;Federal Specification A-A-595