The 990-160180-301 from M2 Global Technology is a RF & Microwave Circulator with Frequency 1.6 to 1.8 GHz, Average Power Forward 100 W, Insertion Loss 0.4 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for 990-160180-301 can be seen below.