The PL4-21-S-75/BF from MCLI is a Power Divider with Frequency 70 to 140 MHz, Insertion Loss 1 dB, Isolation 20 dB, Input Power 0.5 W, Amplitude Balance 0.2 dB. Tags: Module with Connectors, Lumped Element Power Divider. More details for PL4-21-S-75/BF can be seen below.