The AT36-1120-N from Aaren Technology Ltd is a Between Series RF Adapter with Contact Resistance 1.0 to 1.5 mOhms, Frequency DC to 4 GHz, Insertion Loss 0.1 dB, Mating Cycles 500 Cycles, Insulation Resistance 5000 Mohms. More details for AT36-1120-N can be seen below.