The BL-10 from MCLI is a 90 Degree Hybrid Coupler with Frequency 750 MHz to 1.5 GHz, Insertion Loss 1.3 dB, Isolation 18 dB, Amplitude Balance ±1.5 dB, Phase Balance ±5 Degree. Tags: Module with Connectors, Octave Band. More details for BL-10 can be seen below.