The CHA211217AB from 3Rwave is a RF & Microwave Circulator with Frequency 2.11 to 2.17 GHz, Average Power Forward 175 W, Insertion Loss 0.2 to 0.25 dB, Isolation 22 to 26 dB, Return Loss 22 to 26 dB. Tags: Drop-in Circulator. More details for CHA211217AB can be seen below.