The PE8403 from Pasternack Enterprises Inc is a RF & Microwave Circulator with Frequency 7 to 12.4 GHz, Average Power Forward 10 W, Average Power Reverse 10 W, Insertion Loss 0.4 to 0.5 dB, Isolation 18 to 20 dB. Tags: Coaxial Circulator. More details for PE8403 can be seen below.