The IS-38 from MCLI is a RF & Microwave Isolator with Frequency 4.5 to 9 GHz, Average Power Forward 25 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-38 can be seen below.