The IS-15 from MCLI is a RF & Microwave Isolator with Frequency 2.9 to 3.5 GHz, Average Power Forward 25 W, Peak Power Forward 0.25 kW, Insertion Loss 0.6 dB, Isolation 17 dB. Tags: Module with Connector, Coaxial Isolator. More details for IS-15 can be seen below.