The D3C0670 from DiTom Microwave is a RF & Microwave Circulator with Frequency 600 to 700 MHz, Average Power Forward 300 W, Peak Power 2000 W, Insertion Loss 0.3 to 0.4 dB, Isolation 20 to 23 dB. Tags: Coaxial Circulator. More details for D3C0670 can be seen below.