The IS-90 from MCLI is a RF & Microwave Isolator with Frequency 19.5 to 21.2 GHz, Average Power Forward 25 W, Insertion Loss 0.6 dB, Isolation 21 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-90 can be seen below.