The PE8421 from Pasternack Enterprises Inc is a RF & Microwave Isolator with Frequency 698 to 960 MHz, Average Power Forward 1000 W, Average Power Reverse 30 W, Insertion Loss 0.35 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for PE8421 can be seen below.