The RFCR8912 from RF-CI is a RF & Microwave Circulator with Frequency 3.2 to 6.4 GHz, Average Power Forward 30 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.5 to 0.6 dB. Tags: Drop-in Circulator. More details for RFCR8912 can be seen below.