The RFCR2857 from RF-CI is a RF & Microwave Circulator with Frequency 2.9 to 3.1 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Peak Power 1000 W, Insertion Loss 0.2 to 0.3 dB. Tags: Drop-in Circulator. More details for RFCR2857 can be seen below.