The HX-T-4000-8000-17-5 from A-Info is a RF & Microwave Circulator with Frequency 4 to 8 GHz, Average Power Forward 5 W, Insertion Loss 0.55 dB, Isolation 17 dB, Operating Temperature -20 to 60 Degree C. Tags: Coaxial Circulator. More details for HX-T-4000-8000-17-5 can be seen below.