The ANF-SM-M02 from MECA is a Between Series RF Adapter with Connector Inner Diameter 0.669 inches, Connector Length 1.115 inches, Frequency 0 to 18000 MHz, Insertion Loss 0.006 to 0.010 dB, Temperature -65 to 85 °C. More details for ANF-SM-M02 can be seen below.