The SMA/N-KKS from Talent Microwave Inc is a Between Series RF Adapter with Frequency DC to 18 GHz, Insertion Loss 0 to 0.21 dB, Insulation Resistance 5000 Mohms, Temperature -55 to 165 Degree C, Voltage Rating 1000 V. More details for SMA/N-KKS can be seen below.