The IS-48 from MCLI is a RF & Microwave Isolator with Frequency 15 to 18.2 GHz, Average Power Forward 25 W, Peak Power Forward 0.25 kW, Insertion Loss 0.4 dB, Isolation 17 dB. Tags: Module with Connector, Coaxial Isolator. More details for IS-48 can be seen below.