The PL3-12 from MCLI is a Power Divider with Frequency 0.2 to 800 MHz, Insertion Loss 1.1 dB, Isolation 23 dB, Amplitude Balance 0.3 dB, Phase Balance 3 deg. Tags: Module with Connectors, Lumped Element Power Divider. More details for PL3-12 can be seen below.