The AD33091-291-PS2 from ENS Microwave is a Between Series RF Adapter with Connector Length 19.9 mm, Frequency DC to 18 GHz, Insertion Loss 0 to 0.21 dB, Mating Cycles 500 Cycles, Insulation Resistance 5000 MOhms. More details for AD33091-291-PS2 can be seen below.