You can use this item to extend the wires to 3156/3157 application or to add-on lamps/LED. It can also be used for aftermarket retrofit LED turn signal light and brake lights. Compatible: 3156/3157 (please note that only use black and red wire for 3156 socket) Easy installation, simple plug and play High quality 16 Gauge copper wiring, long efficient lifespan Length: 5 inch long Note:Connect the wires of the socket connector to any 12V power source and insert a correct size light bulb. All connectors has + AND - wires. If it doesn't light up, all you need to do is connect the wires oppositely. PLEASE make sure the power is OFF during installation. Material:Plastic + pure copper wire colour:brown Package Contents: 2 * Bulb Socket Brake Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.