The COI08180817G from Cernex Inc is a RF & Microwave Isolator with Frequency 8 to 18 GHz, Average Power Forward 5 W, Insertion Loss 0.8 dB, Isolation 17 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for COI08180817G can be seen below.