The RFCR6457 from RF-CI is a RF & Microwave Circulator with Frequency 1.6 to 2 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 2000 W, Insertion Loss 0.40 to 0.50 dB. Tags: Coaxial Circulator. More details for RFCR6457 can be seen below.