The 990-570590-101 from M2 Global Technology is a RF & Microwave Circulator with Frequency 5.7 to 5.9 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for 990-570590-101 can be seen below.