The D3C1213 from DiTom Microwave is a RF & Microwave Circulator with Frequency 11.7 to 12.7 GHz, Average Power Forward 10 W, Peak Power 50 W, Insertion Loss 0.2 dB, Isolation 23 dB. Tags: Coaxial Circulator. More details for D3C1213 can be seen below.