The CKB183185BS from 3Rwave is a RF & Microwave Circulator with Frequency 1830 to 1850 MHz, 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 CKB183185BS can be seen below.