The 1.35/1.0-KK from Talent Microwave Inc is a Between Series RF Adapter with Frequency DC to 90 GHz, Insertion Loss 0.60 dB, Insulation Resistance 5000 MOhms, Temperature -55 to 125 Degree C, Voltage Rating 500 V (DWV). More details for 1.35/1.0-KK can be seen below.