The RI1220CS-107128 from ZTS Technologies is a RF & Microwave Isolator with Frequency 10.7 to 12.8 GHz, Average Power Forward 20 W, Average Power Reverse 5 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI1220CS-107128 can be seen below.