The HD-B12D43-OLrev8 from RD Microwaves is a 90 Degree Hybrid Coupler with Frequency 350 MHz to 6 GHz, Average Power 150 to 210 W, Isolation 16 to 28 dB, Coupling 3.1 to 3.3 dB, PIM 160 dBc. Tags: Module with Connectors. More details for HD-B12D43-OLrev8 can be seen below.