The 4315-4 from Narda-MITEQ is a Power Divider with Frequency 8 to 12.4 GHz, Insertion Loss 0.8 dB, Isolation 18 dB, Input Power 1 to 30 W, Amplitude Balance 0.4 dB. Tags: Module with Connectors, Reactive Power Divider, Octave Power Divider. More details for 4315-4 can be seen below.