The CMB183187CS from 3Rwave is a RF & Microwave Circulator with Frequency 1839.9 to 1879.9 MHz, Average Power Forward 100 W, Insertion Loss 0.25 to 0.3 dB, Isolation 21 to 25 dB, Return Loss 21 to 25 dB. Tags: Surface Mount Circulator. More details for CMB183187CS can be seen below.