The IS-156 from MCLI is a RF & Microwave Isolator with Frequency 1.7 to 2.5 GHz, Average Power Forward 100 W, Insertion Loss 0.4 dB, Isolation 35 dB, Operating Temperature -30 to 70 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for IS-156 can be seen below.