The L504 from Microwave Engineering Corporation is a 90 Degree Hybrid Coupler with Frequency 1.0 to 2.0 GHz, Average Power 50 to 400 W, Peak Power 6 kW, Isolation 18 to 23 dB, Coupling 3.1 dB. Tags: Module with Connectors, Octave Band. More details for L504 can be seen below.