The JCD17K2T17K9G1-B from JQL Electronics is a RF & Microwave Circulator with Frequency 17.2 to 17.9 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 JCD17K2T17K9G1-B can be seen below.