The HD32953 from HD Communications Corp is a RF & Microwave Circulator with Frequency 0.3 to 0.6 GHz, Average Power 600 to 1000 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 85 Degree C. Tags: Coaxial Circulator. More details for HD32953 can be seen below.