The RFCR3813 from RF-CI is a RF & Microwave Circulator with Frequency 2.9 to 3.5 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Peak Power 1000 W, Insertion Loss 0.40 to 0.50 dB. Tags: Coaxial Circulator. More details for RFCR3813 can be seen below.