The CGS-5912 from Stellant Systems is a RF & Microwave Circulator with Frequency 5.9 to 12.4 GHz, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for CGS-5912 can be seen below.