The RFCR2337 from RF-CI is a RF & Microwave Circulator with Frequency 1 to 1.4 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.4 to 0.6 dB. Tags: Drop-in Circulator. More details for RFCR2337 can be seen below.