N series are very popular screw-coupling middle-or-low power coaxial connectors with impedances of 50 ohms and 75 ohms. They are widely used for electrical instruments or applications where vibration resistance and environmental protection is required, including communication equipment, coaxial components, duplexers, couplers, microwave testing system and microwave network or connecting RF cables. Connected with high accuracy semi-flexible or semi-rigid cables N connectors can work up to 11GHz resulting in low VSWR.