12 Gauge primary automotive wire on a 500 Ft. Spool. Available in Pink and Purple. PVC insulation is ROHS compliant and is temperature rated to 221°F (105°C). For general purpose low voltage electrical use. Meets SAE J1128. Voltage rating up to 60 volts. Copper core is made from 19 strands of 25 Gauge pure copper. Made in the USA.