The T4YP1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4 to 6 GHz, Average Power 25 W, Average Power Forward 25 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T4YP1 can be seen below.