The D4C0112 from DiTom Microwave is a RF & Microwave Circulator with Frequency 1.2 to 1.4 GHz, Average Power Forward 200 W, Peak Power 1250 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Circulator. More details for D4C0112 can be seen below.