The CMB180188CS_18001880 from 3Rwave is a RF & Microwave Circulator with Frequency 1800 to 1880 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 CMB180188CS_18001880 can be seen below.