The PE91739 from Pasternack Enterprises Inc is a In Series RF Adapter with Frequency DC to 40 GHz, Connector Length 0.70 Inches, Insertion Loss 0.76 dB, Mating Cycles 500 Cycles(Smooth Bore), 100 Cycles(Full Detent), Temperature -40 to 125 Degree C. Tags: Spring Loaded. More details for PE91739 can be seen below.