The HD33020 from HD Communications Corp is a RF & Microwave Circulator with Frequency 2.5 to 2.7 GHz, Average Power 40 W, Insertion Loss 0.3 dB, Isolation 21 dB, Operating Temperature -40 to 85 Degree C. Tags: TAB, Drop-in Circulator. More details for HD33020 can be seen below.