THHN Building Wire, Heat, Moisture, Gasoline and Oil Resistant;Simpull(R) Technology For Easier Pulling Additional Information, Commercial;Industrial Application, Red, 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-59544