The RFCR6177 from RF-CI is a RF & Microwave Circulator with Frequency 220 to 280 MHz, Average Power Forward 250 W, Average Power Reverse 250 W, Peak Power 2500 W, Insertion Loss 0.50 to 0.70 dB. Tags: Coaxial Circulator. More details for RFCR6177 can be seen below.