The QAS1M4 from Qualwave is a Between Series RF Adapter with Contact Resistance 1 mOhms(Outer), 2 mOhms(Center), Frequency DC to 0.3 GHz, Mating Cycles 500 Cycles, Temperature -45 to 125 Degree C, Voltage Rating 3000 V (RMS). More details for QAS1M4 can be seen below.
