The IS-52 from MCLI is a RF & Microwave Isolator with Frequency 1.4 to 2.8 GHz, Average Power Forward 25 W, Peak Power Forward 0.25 kW, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for IS-52 can be seen below.