The RFCR2124 from RF-CI is a RF & Microwave Circulator with Frequency 430 to 460 MHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.25 to 0.3 dB. Tags: Drop-in Circulator. More details for RFCR2124 can be seen below.