Scanstrut APT-GPS-01 PowerTower Central GPS/VHF Antenna BarThis 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