Series1 Switch Box The Series1 switch box from Mansfield Motorsports is engineered to withstand the toughest conditions of extreme sports. Made from cast aluminum, this switch box is perfect for engine swaps, demolition derby, racing, mud trucks, and many more applications. Each unit contains (3) 20-amp switches and (1) high grade durable momentary push to start button, complete with rubber dust caps and includes (1) power indicator LED as well as a 12v voltage meter. All prewired with our custom 12GA heavy duty wiring harness. Easy install with the included 11GA steel backing bracket for added protection. With over 10 years of hard-hitting action-packed testing, Mansfield Motorsports works to put your ride in the winner’s circle!