The PE8306 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 18 to 26.5 GHz, Average Power Forward 1 W, Average Power Reverse 1 W, Insertion Loss 0.6 dB, Isolation 17 dB. Tags: Module with Connector, Coaxial Isolator. More details for PE8306 can be seen below.