The RI3238AS-027042 from ZTS Technologies is a RF & Microwave Isolator with Frequency 2.7 to 4.2 GHz, Average Power Forward 50 W, Average Power Reverse 20 W, Insertion Loss 0.6 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for RI3238AS-027042 can be seen below.