The JCD1850T1910M15-II from JQL Electronics is a RF & Microwave Circulator with Frequency 1.85 to 1.91 GHz, Average Power Forward 150 W, Insertion Loss 0.25 dB, Isolation 22 dB, Operating Temperature -35 to 85 Degree C. Tags: Drop-in Circulator. More details for JCD1850T1910M15-II can be seen below.