Scanstrut APT-GPS-01 PowerTower Central GPS/VHF Antenna Bar This Scanstrut central GPS/VHF antenna bar is designed to use with the PowerTower radar mount. The hollowed out inside of the light bar allows you internally route your cable into the PowerTower. Product Features: Internal Cable Routing 1″ x 14 TPI Thread Unique 4-Step Marine Paint System Click here for Scanstrut PowerTower Central GPS/VHF Antenna Bar