The 3G8BM-1 from Renaissance Electronics Corporation is a RF & Microwave Circulator with Frequency 8.5 to 18 GHz, Average Power Forward 4 W, Insertion Loss 1.1 dB, Isolation 14 dB, Operating Temperature -20 to 70 Degree C. Tags: Drop-in Circulator. More details for 3G8BM-1 can be seen below.