The RC1319CS-107127 from ZTS Technologies is a RF & Microwave Circulator with Frequency 10.7 to 12.7 GHz, Average Power Forward 30 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -10 to 60 Degree C. Tags: Module with Connectors, Coaxial Circulator. More details for RC1319CS-107127 can be seen below.