The ANF-DM-M01 from MECA is a Between Series RF Adapter with Connector Inner Diameter 1.27 inches, Connector Length 1.571 inches, Frequency 0 to 18000 MHz, Insertion Loss 0.010 to 0.020 dB, Temperature -65 to 85 °C. More details for ANF-DM-M01 can be seen below.