The RFCR6161B from RF-CI is a RF & Microwave Circulator with Frequency 380 to 430 MHz, Average Power Forward 250 W, Average Power Reverse 250 W, Peak Power 2500 W, Insertion Loss 0.30 to 0.40 dB. Tags: Coaxial Circulator. More details for RFCR6161B can be seen below.