The W1S108-K00S3 from Rosenberger is a Between Series RF Adapter with Return Loss 12 to 18 dB, Contact Resistance 6 mOhms, Frequency DC to 65 GHz, Insertion Loss 1.2 dB, Insulation Resistance 3500 MOhms. More details for W1S108-K00S3 can be seen below.