The ETC0185 from Nova Microwave is a RF & Microwave Circulator with Frequency 1.805 to 1.885 GHz, Average Power Forward 250 W, Average Power Reverse 100 W, Insertion Loss 0.18 dB, Isolation 23 dB. Tags: Drop-In, Drop-in Circulator. More details for ETC0185 can be seen below.