The RFCR2150 from RF-CI is a RF & Microwave Circulator with Frequency 470 to 570 MHz, Average Power Forward 300 W, Average Power Reverse 300 W, Peak Power 1000 W, Insertion Loss 0.35 to 0.5 dB. Tags: Drop-in Circulator. More details for RFCR2150 can be seen below.