The BL-8 from MCLI is a 90 Degree Hybrid Coupler with Frequency 200 to 400 MHz, Insertion Loss 0.6 dB, Isolation 20 dB, Amplitude Balance ±1.0 dB, Phase Balance ±3 Degree. Tags: Module with Connectors, Octave Band. More details for BL-8 can be seen below.