Garmin Thru-Hull Stem Extender LVS32. Multiple stem extenders can be threaded together and used in extremely thick hulled boats or in deep keeled boats. Easy thread to thread assembly makes tough installations a breeze. Specifications for Garmin LVS32 Thru-Hull Stem Extender: Manufacturer: Garmin Color: Black Package Contents: Garmin LVS32 Thru-Hull Stem Extender Garmin 010-12928-00: Thru-Hull Stem Extender LVS32