The 890-180188-301 from M2 Global Technology is a RF & Microwave Circulator with Frequency 1.8 to 1.88 GHz, Average Power Forward 150 W, Insertion Loss 0.25 dB, Operating Temperature -20 to 70 Degree C. Tags: Drop-in Circulator. More details for 890-180188-301 can be seen below.