The T4XY5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.75 to 5.25 GHz, Average Power 30 W, Average Power Forward 30 W, Insertion Loss 0.3 dB, Isolation 22 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T4XY5 can be seen below.