Description If you already have a Seaview modular Light Bar and need lights or adapters to mount GPS units or a wind transducer you've come to the right place. Part # Description LTBLED12C5 (WHITE) C5 certified Round Seaview 3NM LED combination mast head allround light / IP67 watertight with 7' of wire (12v). USCG approved for boats up to 20 meters (65.6') in length. LTBLED12C5BLK (BLACK) Round Seaview 3NM LED combination mast head allround light / IP67 watertight with 7' of wire (12v). USCG approved for boats up to 20 meters (65.6') in length. LTBBOXW (WHITE) universal box top for all-round, masthead and stern (lights not included). Download dimensional drawing here. LTBBOX (BLACK) universal box top for all-round, masthead and stern (lights not included). Download dimensional drawing here. LTBU1A Universal light bar top for mounting your own light and or GPS unit. (Light and electronics not included) LTBU1ALED12C5 Universal light bar top for GPS or wind instrument with 12" light post and LED nav light (LTBU1A + SVLTP12 + LTBLED12) PMU2ALED12C5 Light bar top with an LED light on 12" post and 2 threaded 1-14 bases for GPS units. Download dimensional drawing here. LTBU Plastic Adapter to mount a GPS unit or wind transducer. Uses standard 1-14 threads. Download dimensional drawing here. LTBUSS Stainless Steel Adapter to mount a GPS unit or wind transducer. Uses standard 1-14 threads.