The BM13800.8 from Bracke Manufacturing is a Gain Equalizer with Frequency 2 to 18 GHz, Gain Equalization 8 dB, Insertion Loss 2 dB, Impedance 50 Ohms, Operating Temperature -55 to 85 Degree C. Tags: Connectorized, Negative Gain Slope. More details for BM13800.8 can be seen below.