The PE8312 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 4 to 8 GHz, Average Power Forward 10 W, Average Power Reverse 10 W, Insertion Loss 0.6 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for PE8312 can be seen below.