- Lamp holder base makes the absorption of ship's vibation possible- Improved the existing one-side hinged type to the dual hinged type for separation of the upper and lower parts to be prepared mounting hinge to make the installation on the desirous any position possible, such as Port Side Light on port side, Starboard Side Light and other Lights on starboard side, in no interference with structure of the hull.- Fitting slit holes(155.8~178mm) make the interchange of other products...