The Universal Light Bar Wire Harness with Switch and Heavier Gauge is the perfect solution for your 40-50 inch light bars. This wire harness includes a switch with an on and off position that can be easily controlled from inside your vehicle. With protected wiring, it ensures consistent power and reliable performance. This practical and versatile product is designed to fit most 40-50 inch light bars, providing a convenient and efficient solution for both a switch and wiring extension.