The Z7550R-FMSF+ from Mini Circuits is a Impedance Matching Pad with Frequency DC to 2.5 GHz, Input Power 0.25 W, Attenuation 5.7 to 6.3 dB, Operating Temperature -40 to 85 Degree C, Storage Temperature -55 to 100 Degree C. Tags: Connectorized, 50 to 75 Ohms. More details for Z7550R-FMSF+ can be seen below.