The T12A1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 12.6 to 13.1 GHz, Average Power 2 W, Average Power Forward 2 W, Insertion Loss 0.5 dB, Isolation 40 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T12A1 can be seen below.