The QAKP from Qualwave is a Between Series RF Adapter with Contact Resistance 2 to 3 mOhms(Outer), 6 mOhms(Center), Frequency DC to 40 GHz, Insertion Loss 0.12 dB, Mating Cycles 500 Cycles, Temperature -55 to 125 Degree C. More details for QAKP can be seen below.