Car Audio Speaker Wire - 18/2 gauge 2conductor car speaker automotive wire is ideal for car sound system electrical connections and other applications involving low voltage electrical connections, and it is also commonly used for indoor applications. Higher Resistant Electrical Wire - This General Purpose Thermoplastic (GPT) wire is ideal for under-hood or cabin applications because it resist oils, fuels, and solvents. Also, PVC insulator works well between -40°F to 185°F. Easy Polarity Car Speaker Wire - Each wire color represents a polarity. By default, red is the positive, and black is the negative of the circuit. This coding is ideal for reducing short circuit risk. Bonded GPT Wire Reel - Cables on reels are the best way to store cables because they avoid the risk of breakage. In addition, they are easy to transport and are excellent for using only the cable required for each installation. Available in Several Sizes - Each GearIT sound cable is available in different sizes to suit your needs, from 20 gauge to 12 gauge, and lengths ranging from 100 to 500 feet.