The SDFA180188AA 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 SDFA180188AA can be seen below.