The CCD02020321G4 from Cernex Inc is a RF & Microwave Circulator with Frequency 2.01 to 2.025 GHz, Average Power Forward 50 W, Insertion Loss 0.3 dB, Isolation 21 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-In, Drop-in Circulator. More details for CCD02020321G4 can be seen below.