Combination Navigation Lights Corrosion resistant 304 stainless steel Two mile visibility For Use on Boats up to 20 Meters (65 ½) Impact resistant housing with smooth contour Watertight design & Internal gasket Provides 112.5 degree visibility No disassembly required for installation Small for limited space mounting Six-position bulb holder provides more points of contact 10 watt festoon bulbs included Meets or Exceeds ABYC, UL, NMMA, ’72 Coloregs from the U.S.Inland Navigation Rules and U.S. Coast Guard Regulated Standards