The RFCR8917 from RF-CI is a RF & Microwave Circulator with Frequency 4 to 10 GHz, Average Power Forward 20 W, Average Power Reverse 30 W, Peak Power 250 W, Insertion Loss 0.6 to 0.7 dB. Tags: Drop-in Circulator. More details for RFCR8917 can be seen below.