The CCC-21A-7090 from Stellant Systems is a RF & Microwave Circulator with Frequency 0.7 to 0.9 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Circulator. More details for CCC-21A-7090 can be seen below.