The E4XB8 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4 to 12 GHz, Average Power 0.2 W, Average Power Forward 0.2 W, Insertion Loss 2 dB, Isolation 18 dB. Tags: Module with Connectors, Coaxial Isolator. More details for E4XB8 can be seen below.