The RFCR8937 from RF-CI is a RF & Microwave Circulator with Frequency 10 to 20 GHz, Average Power Forward 10 W, Average Power Reverse 30 W, Peak Power 250 W, Insertion Loss 0.7 to 0.9 dB. Tags: Drop-in Circulator. More details for RFCR8937 can be seen below.