The 990-210220-301 from M2 Global Technology is a RF & Microwave Circulator with Frequency 2.1 to 2.2 GHz, Average Power Forward 100 W, Insertion Loss 0.3 dB, Operating Temperature -20 to 85 Degree C. Tags: Drop-in Circulator. More details for 990-210220-301 can be seen below.