The E1G518G4 from Microwave Circuits is a Gain Equalizer with Frequency 1.5 to 18 GHz, Gain Equalization 18.5 dB, Insertion Loss 1.5 to 20 dB, Power 30 dBm, Impedance 50 Ohms. Tags: Module with Connectors, Positive Gain Slope. More details for E1G518G4 can be seen below.