The ZCI18S-8-12-30A from ZTS Technologies is a RF & Microwave Isolator with Frequency 8 to 12 GHz, Average Power Forward 30 W, Insertion Loss 0.5 dB, Isolation 18 dB, Operating Temperature 10 to 60 Degree C. Tags: Coaxial Isolator. More details for ZCI18S-8-12-30A can be seen below.