The RI1523CS-045055 from ZTS Technologies is a RF & Microwave Isolator with Frequency 4.5 to 5.5 GHz, Average Power Forward 60 W, Average Power Reverse 10 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI1523CS-045055 can be seen below.