The RFCR3404 from RF-CI is a RF & Microwave Circulator with Frequency 1.71 to 1.88 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.30 to 0.35 dB. Tags: Coaxial Circulator. More details for RFCR3404 can be seen below.