Code 4 LED Wiring Harness for 40" and 50" light bars. This wiring harness comes with ring terminals for battery connection, large size cable, 12V 40A epoxy sealed relay with mount, fuse holder with 30 amp fuse, durable PVC wire protector sleeve, lighted rocker switch, and 1 waterproof deutsch connector. This fits single and double row light bars in 40" and 50"