The CYC012012WD from 3Rwave is a RF & Microwave Circulator with Frequency 121.8 to 123.1 MHz, Average Power Forward 10000 W, Insertion Loss 0.25 to 0.3 dB, Isolation 21 dB, Return Loss 21 dB. Tags: Drop-in Circulator. More details for CYC012012WD can be seen below.