The D3C4012YMG from DiTom Microwave is a RF & Microwave Circulator with Frequency 4 to 12 GHz, Average Power Forward 20 W, Peak Power 30 W, Insertion Loss 1 dB, Isolation 12 dB. Tags: Module with Connector, Coaxial Circulator. More details for D3C4012YMG can be seen below.