The 4.1/9.5 name derives from the coupling diameter of this connector. They are very rugged connectors with screw
lock, impedance of 50 Ohms and can be used up to 14 GHz.
They are widely used in Europe, for low loss transmission and reception of RF signals in radio transceivers as mobile
phone base stations. They provide specially low intermodulation and are water protected for outdoor assembly.
Because of their smaller size and competitive pricing in comparison with the 7-16, the 4.1/9.5 is an attractive alternative
to medium power applications.