The 3G4NER from Renaissance Electronics Corporation is a RF & Microwave Circulator with Frequency 1.69 to 2.05 GHz, Average Power Forward 126 W, Insertion Loss 1 dB, Isolation 15 dB, Operating Temperature -20 to 95 Degree C. Tags: Drop-in Circulator. More details for 3G4NER can be seen below.