The EC900F1000DB from ECHO Microwave is a RF & Microwave Circulator with Frequency 900 MHz to 1 GHz, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 20 dB, Operating Temperature -30 to 85 Degree C. Tags: Drop-in Circulator. More details for EC900F1000DB can be seen below.