TC Bros. Polished stainless steel 12V Ford Duolamp reproduction tail light with red glass lens. The light features both a brake/running light as well as a License plate light to illuminate your plate at night. The two-wire hook-up for the brake and tail lights means this light is self-grounding through its housing. The black wire is the 12V positive running light hookup. The green wire is the 12V positive brake light hookup. Light features standard automotive-style bulbs (#1156 for Brake Light, and #67 miniature for Running Light). Replacement bulbs are easily sourced from local auto parts stores should you ever require. These lights measure 3 3/4" in diameter, 2 1/4" deep. The mounting studs are 1 3/4" center to center. Great light for your old school bobber or chopper! Note: For best results on high-vibration applications, isolate the tail light mount with rubber grommets.