The RFCR2881 from RF-CI is a RF & Microwave Circulator with Frequency 6.4 to 7.2 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 RFCR2881 can be seen below.