RUPP Marine Upper Antenna Support Assembly Threaded. 5" OD ANTENNAS and black anodized Jam nut (03-1103-23). Select antenna collar option in drop-down menu above. Specifications for RUPP Marine Threaded Upper Antenna Support Assembly: Manufacturer: RUPP Marine Color: Black Package Contents: RUPP Marine Threaded Upper Antenna Support Assembly RUPP Marine 209-1268-00: Upper Antenna Support Assembly Threaded