The IS-6 from MCLI is a RF & Microwave Isolator with Frequency 1.47 to 1.5 GHz, Average Power Forward 50 W, Insertion Loss 0.5 dB, Isolation 17 dB, Operating Temperature -10 to 55 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-6 can be seen below.