The D21503 from Clear Microwave, Inc is a Power Divider with Frequency 1.5 to 3 GHz, Insertion Loss 0.3 to 0.4 dB, Isolation 22 to 24 dB, Input Power 30 W, Amplitude Balance 0.04 dB. Tags: Module with Connectors, Through Hole, Octave Power Divider. More details for D21503 can be seen below.