The IS-129 from MCLI is a RF & Microwave Isolator with Frequency 1.5 to 3 GHz, Average Power Forward 10 W, Peak Power Forward 0.1 kW, Insertion Loss 0.6 dB, Isolation 17 dB. Tags: Module with Connector, Coaxial Isolator. More details for IS-129 can be seen below.