The RFCR8805 from RF-CI is a RF & Microwave Circulator with Frequency 2.1 to 4.2 GHz, Average Power Forward 30 W, Average Power Reverse 50 W, Peak Power 500 W, Insertion Loss 0.5 to 0.7 dB. Tags: Drop-in Circulator. More details for RFCR8805 can be seen below.