The CKB180188AS from 3Rwave is a RF & Microwave Circulator with Frequency 1805 to 1880 MHz, Average Power Forward 150 W, Insertion Loss 0.25 to 0.35 dB, Isolation 20 to 26 dB, Return Loss 20 to 26 dB. Tags: Surface Mount Circulator. More details for CKB180188AS can be seen below.