The HL-3/NF from MCLI is a 90 Degree Hybrid Coupler with Frequency 20.9 to 21.9 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-3/NF can be seen below.