The RI4564XN-350-500 from ZTS Technologies is a RF & Microwave Isolator with Frequency 0.35 to 0.5 GHz, Average Power Forward 300 W, Average Power Reverse 300 W, Insertion Loss 0.65 dB, Isolation 16 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI4564XN-350-500 can be seen below.