The 1580-1 from Weinschel by Spectrum Control is a Power Divider with Frequency DC to 26.5 GHz, Insertion Loss 8.5 dB, Input Power 1 W, Amplitude Balance 0.2 dB, Phase Balance 8 Degrees. Tags: Module with Connectors, Resistive Power Divider. More details for 1580-1 can be seen below.