HD Flag Pole Antenna Coax Cable for Base Camp and Base Stations, the thickest coaxial cable we carry at 0.4 inches in diameter, is designed for connecting a mobile radio to a distant fiberglass antenna, including placement atop a trailer or flag pole. Suitable for both indoor or outdoor applications, this cable ideally connects with our fiberglass antenna, but works with our standard NMO style antennas when using an adapter. Custom lengths or connectors could incur a labor charge due to the larger cable diameter and special tool requirement. Two standard lengths - 25' and 35' - are available.