The RFCR2153 from RF-CI is a RF & Microwave Circulator with Frequency 770 to 870 MHz, Average Power Forward 300 W, Average Power Reverse 300 W, Peak Power 1000 W, Insertion Loss 0.3 to 0.4 dB. Tags: Drop-in Circulator. More details for RFCR2153 can be seen below.