The 4372-2 from Narda-MITEQ is a Power Divider with Frequency 800 MHz to 2.5 GHz, Insertion Loss 0.3 to 0.5 dB, Isolation 25 dB, Input Power 0.5 to 30 W, Amplitude Balance 0.2 dB. Tags: Module with Connectors, Reactive Power Divider. More details for 4372-2 can be seen below.