The RC2528BS-1.7-1.89 from ZTS Technologies is a RF & Microwave Circulator with Frequency 1.7 to 1.89 GHz, Average Power Forward 100 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC2528BS-1.7-1.89 can be seen below.