The SCHA180199AB from Sangshin is a RF & Microwave Circulator with Frequency 1805 to 1990 MHz, Average Power Forward 200 W, Insertion Loss 0.2 to 0.25 dB, Isolation 21 to 25 dB, Return Loss 21 to 25 dB. Tags: Drop-in Circulator. More details for SCHA180199AB can be seen below.