The JCD1930T1990M6-II from JQL Electronics is a RF & Microwave Circulator with Frequency 1.93 to 1.99 GHz, Average Power Forward 60 W, Insertion Loss 0.35 dB, Isolation 20 dB, Operating Temperature -35 to 85 Degree C. Tags: Drop-in Circulator. More details for JCD1930T1990M6-II can be seen below.