material center contact gold plated brass, outer contact silver plated beryllium copper, other metal parts silver plated brass, dielectric polytetrafluoroethylene, gasket silicone rubber; electrical properties impedance 50 ohms; working voltage 500 volts rms max; vswr 1.25:1 max up to 1 ghz; insertion loss less than 0.10 db up to 1 ghz