The W1K109-K00D3 from Rosenberger is a Between Series RF Adapter with Return Loss 12 to 18 dB, Contact Resistance 6 mOhms, Frequency DC to 50 GHz, Insertion Loss 1.2 dB, Insulation Resistance 3500 MOhms. More details for W1K109-K00D3 can be seen below.