The RMHY3.200-500R from Response Microwave Inc is a 90 Degree Hybrid Coupler with Frequency 200 to 500 MHz, Insertion Loss 0.3 dB, Isolation 20 dB, Coupling 3 dB, Coupling Variation +/- 0.3 dB. Tags: Module with Connectors. More details for RMHY3.200-500R can be seen below.