The 30.031.004-091 from CPE Italia S.p.a. is a In Series RF Adapter with Frequency DC to 11 GHz, Contact Resistance 1 mOhms(Center Contact Resistance), 0.25 GOhms(Outer Contact Resistance), Insulation Resistance 5 GOhms, Mating Cycles 500 Cycles, Temperature -55 to 125 Degree C. More details for 30.031.004-091 can be seen below.