The AT36-2040-N-G from Aaren Technology Ltd is a Between Series RF Adapter with Contact Resistance 2.0 to 3.0 mOhms, Frequency DC to 4 GHz, Insertion Loss 0.1 dB, Mating Cycles 500 Cycles, Insulation Resistance 5000 Mohms. More details for AT36-2040-N-G can be seen below.