EASY POLARITY IDENTIFICATION - Easy color coded ground wire helps with installation to let you know which cable should connect to the terminal. Making a polarity error could cause serious damage to your audio equipment. WIDE COMPATIBILITY - Also known as power wire, ground wire, trolling motor wire, automotive wire, speaker wire, car radio wire, amp wire, electrical wire, or welding wire designed for up to 300v voltage. We have many gauge wires to choose from, such as 1/0awg, 4awg, 8awg with black, red, blue wire color options and 25ft, 50ft lengths