The PDM-21-12G SQ from Crane Aerospace & Electronics is a Power Divider with Frequency 10500 to 13000 MHz, Insertion Loss 0.5 dB, Isolation 20 dB, Input Power 2 W, Amplitude Balance ±0.2 dB. Tags: Module with Connectors, Wilkinson Power Divider. More details for PDM-21-12G SQ can be seen below.