The T5YB4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 5.975 to 6.475 GHz, Average Power 10 W, Average Power Forward 10 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T5YB4 can be seen below.