The CKB211217BS from 3Rwave is a RF & Microwave Circulator with Frequency 2.11 to 2.17 GHz, Average Power Forward 150 W, Insertion Loss 0.25 to 0.3 dB, Isolation 22 to 26 dB, Return Loss 22 to 26 dB. Tags: Surface Mount Circulator. More details for CKB211217BS can be seen below.