The QAN4 from Qualwave is a Between Series RF Adapter with Contact Resistance 0.2 to 1 mOhms(Outer), 1 mOhms(Center), Frequency DC to 6 GHz, Mating Cycles 500 Cycles, Temperature -45 to 125 Degree C, Voltage Rating 1000 to 2500 V (RMS). More details for QAN4 can be seen below.