The BL-9/NF from MCLI is a 90 Degree Hybrid Coupler with Frequency 500 MHz to 1 GHz, Insertion Loss 1 dB, Isolation 18 dB, Amplitude Balance ±1.3 dB, Phase Balance ±5 Degree. Tags: Module with Connectors, Octave Band. More details for BL-9/NF can be seen below.