The PL4-1-I from MCLI is a Power Divider with Frequency 0.5 to 100 MHz, Insertion Loss 0.8 dB, Isolation 25 dB, Amplitude Balance 0.1 dB, Phase Balance 1 deg. Tags: Module with Connectors, Lumped Element Power Divider. More details for PL4-1-I can be seen below.