The 990-135145-901 from M2 Global Technology is a RF & Microwave Circulator with Frequency 1.35 to 1.45 GHz, Average Power Forward 10 W, Insertion Loss 0.4 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for 990-135145-901 can be seen below.