The DC-910-154 from RF & Noise Components is a RF & Microwave Circulator with Frequency 860 to 960 MHz, Average Power Forward 250 W, Insertion Loss 0.3 to 0.35 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB. Tags: Drop-in Circulator. More details for DC-910-154 can be seen below.