The JCD2900T3100G2 from JQL Electronics is a RF & Microwave Circulator with Frequency 2.9 to 3.1 GHz, Average Power Forward 20 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: Drop-in Circulator. More details for JCD2900T3100G2 can be seen below.