The DH9-2-4G-1555 from COM-MW is a RF & Microwave Circulator with Frequency 2 to 4 GHz, Average Power Forward 100 W, Insertion Loss 0.6 dB, Isolation 17 dB, Operating Temperature -30 to 70 Degree C. Tags: Module With Connector, Coaxial Circulator. More details for DH9-2-4G-1555 can be seen below.