The RFCR2921 from RF-CI is a RF & Microwave Circulator with Frequency 9 to 9.6 GHz, Average Power Forward 35 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.3 to 0.4 dB. Tags: Drop-in Circulator. More details for RFCR2921 can be seen below.