Dethmers Manufacturing Company Demco Towed Vehicle Tail Light Wiring Diode Kit. There diodes prevent the backflow of electrical feedback to protect both vehicles' electrical systems. All the necessary hardware comes with each kit to include: 4 heat sealed diodes 26 ft. 4 conductor 16 gauge wire butt connectors ring terminals nylon ties and wiring instructions. Features of Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit Heat sealed diodes to connect your motorhome's running lights turn signals and brake lights to your towed vehicle Diodes prevent the backflow of electrical feedback to protect both vehicles' electrical systems All the necessary hardware comes with each kit Include 4 heat sealed diodes 26 ft. 4 conductor 16 gauge wire butt connectors ring terminals nylon ties and wiring instructions Package Contents: Dethmers Manufacturing Company 9523010 Demco Towed Vehicle Tail Light Wiring Diode Kit Dethmers Manufacturing Company 9523010: Demco Towed Vehicle Tail Light Wiring Diode Kit