The SDFA211217AA from Sangshin is a RF & Microwave Circulator with Frequency 2110 to 2170 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 SDFA211217AA can be seen below.