The PL4-12-I from MCLI is a Power Divider with Frequency 20 to 400 MHz, Insertion Loss 1.8 dB, Isolation 17 dB, Amplitude Balance 0.5 dB, Phase Balance 5 deg. Tags: Module with Connectors, Lumped Element Power Divider. More details for PL4-12-I can be seen below.