The 3G4NEW from Renaissance Electronics Corporation is a RF & Microwave Circulator with Frequency 1.325 to 1.475 GHz, Average Power Forward 250 W, Insertion Loss 0.30 dB, Isolation 20 dB, Operating Temperature -40 to 80 Degree C. Tags: Drop-in Circulator. More details for 3G4NEW can be seen below.