The SG10525 from Honeywell Aerospace is a Space Qualified Circulator with Frequency 3.6 to 4 GHz, Insertion Loss 0.3 to 0.4 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB, Operating Temperature -10 to 65 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for SG10525 can be seen below.