The CG10540 from Honeywell Aerospace is a Space Qualified Circulator with Frequency 4 to 8 GHz, Insertion Loss 0.4 to 0.5 dB, Isolation 18 to 20 dB, Return Loss 18 to 20 dB, Operating Temperature -10 to 65 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for CG10540 can be seen below.