The HX-T-1700-1900-20-50 from A-Info is a RF & Microwave Circulator with Frequency 1.7 to 1.9 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: Coaxial Circulator. More details for HX-T-1700-1900-20-50 can be seen below.