Tram  8" Marine Gps Antenna - Tram, Marine Electronics Marine Antennas 1 inch 14-Thread Standard Marine Mounting Nylon ratchet mount for easy lay-down Min 2.5 volt - Max 5.5 volt Gain: 3 db 1 inch 14-Thread Standard Marine Mounting 23 feet rg-58 a/u coaxial cable with BNC-male connector Nylon ratchet mount for easy lay-down Min 2.5 volt  Max 5.5 volt Gain: 3 db 1 inch 14-Thread Standard Marine Mounting 23 feet rg-58 a/u coaxial cable with BNC-male connector