The RFCR6603 from RF-CI is a RF & Microwave Circulator with Frequency 1.76 to 2.25 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 RFCR6603 can be seen below.