The Optronics LED Combination Taillight is designed for marine trailer applications. Completely sealed and waterproof, this potted trailer light works just as well underwater as out. Low-profile passenger-side 7-function taillight has 18 LED diodes. Standard two-stud mounting. Hard-wired with separate ground wire. Taillight measures 2-7/8"H x 8-1/16"W x 2-13/16"D. DOT approved.