The BL-18/NF from MCLI is a 90 Degree Hybrid Coupler with Frequency 200 to 300 MHz, Insertion Loss 0.75 dB, Isolation 18 dB, Amplitude Balance ±1.0 dB, Phase Balance ±3 Degree. Tags: Module with Connectors, Octave Band. More details for BL-18/NF can be seen below.