This pair of trailer lights is meant for use on trailers over 80" wide and consists of a 4 1/2" x 4 1/2" stop / tail / turn signal as well as a 2"W x 3"H x 1"L side mount signal. The Standard Stop/Tail/Turn Left Hand trailer light also has an additional clear plate on its underside that acts as a license plate light. The RecStuff line of incandescent trailer lights provide a low cost option for your trailer lighting needs. Whether you're replacing lights on your trailer or installing them for the first time, incandescent trailer lights are the traditional choice for trailer lighting needs. These lights are built with the highest of quality in mind.