The PLH4-21 from MCLI is a Power Divider with Frequency 0.10 to 30 MHz, Insertion Loss 0.4 dB, Isolation 20 dB, Input Power 400 W, Amplitude Balance 0.2 dB. Tags: Module with Connectors, Lumped Element Power Divider. More details for PLH4-21 can be seen below.