The PE8327 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 2 to 6 GHz, Average Power Forward 25 W, Average Power Reverse 2 W, Insertion Loss 0.8 dB, Isolation 14 dB. Tags: Module with Connector, Coaxial Isolator. More details for PE8327 can be seen below.