The DC-800-425 from RF & Noise Components is a RF & Microwave Circulator with Frequency 750 to 850 MHz, Average Power Forward 250 W, Insertion Loss 0.4 to 0.5 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB. Tags: Drop-in Circulator. More details for DC-800-425 can be seen below.