Extra hard usage per NEC. Used for garages, portable tools and lights, battery chargers. Weather-resistant for outdoor applications, dishwashers and refrigerators. Resists most acids 10 AWG through 14 AWG, 60 deg Celsius to 105 deg C. Soft annealed stranded copper per ASTM B3-90 conductor. TPE class 36, rubber insulation. TPE weather-resistant class 36, black rubber jacket. UL 62, UL1581, CSA approved. Black, 250 ft spool.