The RFCR2920D from RF-CI is a RF & Microwave Circulator with Frequency 7.7 to 8.8 GHz, Average Power Forward 35 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.35 to 0.4 dB. Tags: Drop-in Circulator. More details for RFCR2920D can be seen below.