The T4XA1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 4 to 9 GHz, Average Power 10 W, Average Power Forward 10 W, Insertion Loss 1.1 dB, Isolation 35 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T4XA1 can be seen below.