This 11' wiring harness is designed to connect a single Rigid Industries 10"-30" LED light bar to your 12V electrical system. It features battery terminals on one end and a Deutsch connector on the other to connect to the light. It incorporates an inline fuse holder, a 12V relay, and a waterproof switch. This wiring harness is compatible with the following Rigid Industries LED Lights: 10" E-Series, 10" SR-Series, 20" E-Series, 20" SR-Series, 30" E-Series, 30" SR-Series, 40" E-Series, 40" SR-Series. The part number for this harness is Rigid Industries 40193