Primary automotive wire (GPT) is the most common wire used for general purpose electrical wiring of automobiles, motorcycles, boats, RV's, and any other low voltage electrical system, including solar. Our automotive wire is available in sizes ranging from 8 gauge to 20 gauge, and is available in 10 different solid colors: Red, Black, White, Green, Blue, Yellow, Brown, Orange, Purple, and Pink. Our automotive wire is wrapped in a thermoplastic PVC insulation, is smooth for pulling through wire loom and conduit, tough enough to resist grease, oil, and acid, and has a temperature rating of 176°F (80°C). If you need a higher temperature and performance wire, use automotive SXL wire instead. Each copper wire core is composed of smaller gauge strands of pure copper creating high conductivity, flexibility, and durability. Our primary automotive wire is a high quality American Made product and is RoHS compliant. It Meets and exceeds SAE spec J1128 and J378. Ideal for wiring 12 volt or 24 volt electrical systems with a maximum voltage rating of 60 volts.