The T11H1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 11.7 to 13 GHz, Average Power 0.5 W, Average Power Forward 0.5 W, Insertion Loss 0.4 dB, Isolation 25 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T11H1 can be seen below.