The E4XB5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4 to 14 GHz, Average Power 0.1 W, Average Power Forward 0.1 W, Insertion Loss 4 dB, Isolation 30 dB. Tags: Module with Connectors, Coaxial Isolator. More details for E4XB5 can be seen below.