100-Ft., black, 10 gauge, primary wire, durable PVC outer jacket resists water, oil, & chemicals, full gauge, stranded copper for higher current carrying capacity, use for rewiring generator, battery to ammeter, heater switch, panel lights, horn to relay & battery, vehicle electrical systems at nominal voltage of 60DC v, 25AC v, or less, SAE standards, ROHS compliant, spool.