The IS-8-1 from MCLI is a RF & Microwave Isolator with Frequency 3 to 6 GHz, Average Power Forward 1 W, Insertion Loss 0.6 dB, Isolation 15 dB, Operating Temperature 0 to 50 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-8-1 can be seen below.