The EC1805F1880DA from ECHO Microwave is a RF & Microwave Circulator with Frequency 1.8 to 1.88 GHz, Average Power Forward 100 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -20 to 70 Degree C. Tags: Drop-in Circulator. More details for EC1805F1880DA can be seen below.