The RFCR2163 from RF-CI is a RF & Microwave Circulator with Frequency 350 to 410 MHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.40 to 0.50 dB. Tags: Drop-in Circulator. More details for RFCR2163 can be seen below.