The RFCR6903 from RF-CI is a RF & Microwave Circulator with Frequency 5 to 6 GHz, Average Power Forward 50 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.30 to 0.40 dB. Tags: Coaxial Circulator. More details for RFCR6903 can be seen below.