The PL4-18-50 from MCLI is a Power Divider with Frequency 1 to 1000 MHz, Insertion Loss 1.2 dB, Isolation 20 dB, Input Power 50 W, Amplitude Balance 0.5 dB. Tags: Module with Connectors, Lumped Element Power Divider. More details for PL4-18-50 can be seen below.