The RFCR2321 from RF-CI is a RF & Microwave Circulator with Frequency 960 MHz to 1.26 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Peak Power 1000 W, Insertion Loss 0.54 to 0.6 dB. Tags: Drop-in Circulator. More details for RFCR2321 can be seen below.