The COI12180618G from Cernex Inc is a RF & Microwave Isolator with Frequency 12 to 18 GHz, Average Power Forward 20 W, Insertion Loss 0.6 dB, Isolation 18 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for COI12180618G can be seen below.