The RFCR2928D from RF-CI is a RF & Microwave Circulator with Frequency 10 to 12.5 GHz, Average Power Forward 25 W, Average Power Reverse 25 W, Peak Power 250 W, Insertion Loss 0.45 to 0.5 dB. Tags: Drop-in Circulator. More details for RFCR2928D can be seen below.