The RFCR6165 from RF-CI is a RF & Microwave Circulator with Frequency 470 to 520 MHz, Average Power Forward 250 W, Average Power Reverse 250 W, Peak Power 2000 W, Insertion Loss 0.30 to 0.40 dB. Tags: Coaxial Circulator. More details for RFCR6165 can be seen below.