The Everstart 51651-76-04 18-Gauge Red Primary Automotive Wire 40 is recommended for single bulb applications. It comes with an abrasion- and chemical-resistant jacket to ensure it withstands the elements. This wire is rated for 105-degrees Celsius and is colored red for quick identification. The 40 length provides you with plenty of reach to accommodate the job at hand. This automotive electrical wire is designed for use with sound and security systems.