The D4C8012 from DiTom Microwave is a RF & Microwave Circulator with Frequency 8.0 to 12.4 GHz, Average Power Forward 25 W, Peak Power 200 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for D4C8012 can be seen below.