The RI3538XN-010015 from ZTS Technologies is a RF & Microwave Isolator with Frequency 1 to 1.5 GHz, Average Power Forward 300 W, Average Power Reverse 100 W, Insertion Loss 0.6 dB, Isolation 15 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI3538XN-010015 can be seen below.