The RFCR3120 from RF-CI is a RF & Microwave Circulator with Frequency 270 to 335 MHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.50 to 0.70 dB. Tags: Coaxial Circulator. More details for RFCR3120 can be seen below.