The SCHA180188AB from Sangshin is a RF & Microwave Circulator with Frequency 1805 to 1880 MHz, Average Power Forward 200 W, Insertion Loss 0.18 to 0.22 dB, Isolation 22 to 26 dB, Return Loss 22 to 26 dB. Tags: Drop-in Circulator. More details for SCHA180188AB can be seen below.