The CNA-5964 from Stellant Systems is a RF & Microwave Circulator with Frequency 5.9 to 6.4 GHz, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for CNA-5964 can be seen below.