The 134-1000-012 from Cinch Connectivity Solutions is a Between Series RF Adapter with Contact Resistance 6 Mohms (Center Contact), 2.5 Mohms (Outer Contact), Frequency DC to 40 GHz, Mating Cycles 500 Cycles, Insulation Resistance 5000 Mohms, Temperature -55 to 125 Degree C. More details for 134-1000-012 can be seen below.