The CHC0412U917K180 from Cernex Inc is a 180 Degree Hybrid Coupler with Frequency 4 to 12.4 GHz, Average Power 20 W, Coupling 3 dB, Coupling Variation ±1 dB, Insertion Loss 0.9 dB. Tags: Module with Connector. More details for CHC0412U917K180 can be seen below.