The RFCR6811 from RF-CI is a RF & Microwave Circulator with Frequency 3.3 to 3.8 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Peak Power 2000 W, Insertion Loss 0.40 to 0.50 dB. Tags: Coaxial Circulator. More details for RFCR6811 can be seen below.