The RI1523CS-040050 from ZTS Technologies is a RF & Microwave Isolator with Frequency 4 to 5 GHz, Average Power Forward 60 W, Average Power Reverse 10 W, Insertion Loss 0.5 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI1523CS-040050 can be seen below.