Perko Bi-Color Navigation Lights are designed to be used on power driven vessels under 12 meters (39.4 ft.) in length. These lights come in two types: Model 1310 which comes in chrome plated zinc alloy top, and Model 1161 which comes chrome plated with a bronze top.

Both come with a black rubber base that can be mounted to a flat surface with #8 size screws. These lights have a visibility rang of 1 mile and are both 4 in long x 3-1/8 in wide and 1 in height.