The JCD8000T8500G1 from JQL Electronics is a RF & Microwave Circulator with Frequency 8 to 8.5 GHz, Average Power Forward 10 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -40 to 75 Degree C. Tags: Drop-in Circulator. More details for JCD8000T8500G1 can be seen below.