The 990-180217-301 from M2 Global Technology is a RF & Microwave Circulator with Frequency 1.8 to 2.17 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Operating Temperature -10 to 85 Degree C. Tags: Drop-in Circulator. More details for 990-180217-301 can be seen below.