The 154-058-003 from Broadwave Technologies is a Power Divider with Frequency 20 to 500 MHz, Insertion Loss 0.6 to 1 dB, Isolation 15 dB, Input Power 1 W, Amplitude Balance ±0.5 dB. Tags: Module with Connectors, Reactive Power Divider. More details for 154-058-003 can be seen below.