The COI17190520G from Cernex Inc is a RF & Microwave Isolator with Frequency 17.7 to 19.7 GHz, Average Power Forward 10 W, Insertion Loss 0.5 dB, Isolation 20 dB, Operating Temperature -40 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for COI17190520G can be seen below.