The XG10561 from Honeywell is a RF & Microwave Circulator with Frequency 8 to 16 GHz, Insertion Loss 0.6 to 0.7 dB, Isolation 14 to 16 dB, Return Loss 14 to 16 dB, Operating Temperature -10 to 65 Degree C. Tags: Coaxial Circulator. More details for XG10561 can be seen below.