The T-5P9F06S-SPF-004 from Shenzhen Superlink Technology is a Between Series RF Adapter with Contact Resistance 2 to 6 mOhms, Frequency DC to 40 GHz, Insertion Loss 0.63 dB, Mating Cycles 500 Cycles, Insulation Resistance 5000 MOhms. More details for T-5P9F06S-SPF-004 can be seen below.