The HL-4/NF from MCLI is a 90 Degree Hybrid Coupler with Frequency 29.5 to 30.5 MHz, Insertion Loss 0.5 dB, Isolation 25 dB, Amplitude Balance ±0.2 dB, Phase Balance ±2 Degree. Tags: Module with Connectors. More details for HL-4/NF can be seen below.