Marine Boat Navigation RED Green Bicolor 13-1/2" Plug in Bow Light Aluminum Post This is a 13-1/2" red green bi-color bow navigation light made in plastic housing and aluminum post. This light has a visibility of 1 Nautical Mile (NM). Material: Plastic Housing & Aluminum Post. Housing Color: Black. Color: Red / Green. Working Voltage: 13 VDC. Visibility: 1NM, 225 Degrees. Mount: 2 Pin Female Connection We do sell the 2-prong stern light base that is compatible with this model. Please consult us to find out more or for a better deal. Dimension: Length: 13-1/2", Light Housing Diameter: 2", and Pole Diameter: 3/4".