The DC-2100-440 from RF & Noise Components is a RF & Microwave Circulator with Frequency 2 to 2.2 GHz, Average Power Forward 250 W, Insertion Loss 0.25 to 0.35 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB. Tags: Drop-in Circulator. More details for DC-2100-440 can be seen below.