The T27D2 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 27.5 to 30 GHz, Average Power 0.25 W, Average Power Forward 0.25 W, Insertion Loss 1 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T27D2 can be seen below.