The JCD12K7T13K5G1-B from JQL Electronics is a RF & Microwave Circulator with Frequency 12.7 to 13.5 GHz, Average Power Forward 10 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -40 to 75 Degree C. Tags: Drop-in Circulator. More details for JCD12K7T13K5G1-B can be seen below.