The 4318-4 from Narda-MITEQ is a Power Divider with Frequency 18 to 40 GHz, Insertion Loss 2.2 dB, Isolation 16 dB, Input Power 0.5 to 30 W, Amplitude Balance 1 dB. Tags: Module with Connectors, Reactive Power Divider, Multi-Octave Power Divider. More details for 4318-4 can be seen below.