The HJK-4R-23G from Crane Aerospace & Electronics is a 180 Degree Hybrid Coupler with Frequency 6 to 40 GHz, Average Power 1 W, Coupling -3 dB, Amplitude Balance 3.6 dB, Phase Balance ±14 Degrees. Tags: Module with Connectors. More details for HJK-4R-23G can be seen below.