20 gauge Primary Automotive Wire - Black - 500 Ft. Spool. For general purpose low voltage (60 volts or less) wiring. Meets SAE J1128. RoHS Compliant. Black PVC insulation provides protection from abrasion, grease, oil, and acids. Strand count is 10-30. Nominal outside diameter: 0.085''. Temperature rating up to 176°F (80°C). Made in America.