The JG10581 from Honeywell is a RF & Microwave Circulator with Frequency 12 to 14 GHz, Insertion Loss 0.4 to 0.5 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB, Operating Temperature -10 to 65 Degree C. Tags: Coaxial Circulator. More details for JG10581 can be seen below.