The DC-2135-160 from RF & Noise Components is a RF & Microwave Circulator with Frequency 2.07 to 2.2 GHz, Average Power Forward 250 W, Insertion Loss 0.2 to 0.25 dB, Isolation 23 to 26 dB, Return Loss 23 to 26 dB. Tags: Drop-in Circulator. More details for DC-2135-160 can be seen below.