The SMA/2.92-JK from Talent Microwave Inc is a Between Series RF Adapter with Frequency DC to 26.5 GHz, Insertion Loss 0.25 dB, Insulation Resistance 5000 MOhms, Temperature -55 to 165 Degree C, Voltage Rating 1000 V. More details for SMA/2.92-JK can be seen below.