The T4YC1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4.9 to 9.5 GHz, Average Power 1 W, Average Power Forward 1 W, Insertion Loss 0.8 dB, Isolation 15 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T4YC1 can be seen below.