The T3ZG4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.47 to 3.49 GHz, Average Power 10 W, Average Power Forward 10 W, Insertion Loss 0.2 dB, Isolation 24 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T3ZG4 can be seen below.