The RST714B Satellite communications antenna is a popular choice for good reason:
The Antenna mounts easily into any bracket with 12.7mm (1/2") minimum diamter hole and is secured firmly by the nut and washer at the base of the spring assembly.
The high quality electro-polished stainless-steel straight spring dampens vibrations while travelling.
5 meters of LMR240UF low loss standard cable bottom exists from the spring assembly. A TNC male connector is fitted to the cable for easy installation.