The 5P4M06S-SPF from Shenzhen Superlink Technology is a Between Series RF Adapter with Contact Resistance 2 to 3 mOhms, Frequency DC to 40 GHz, Insertion Loss 0.31 dB, Mating Cycles 500 Cycles, Insulation Resistance 5000 Mohms. More details for 5P4M06S-SPF can be seen below.