The DC-750-424 from RF & Noise Components is a RF & Microwave Circulator with Frequency 700 to 800 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-750-424 can be seen below.