The C27A3 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 27.5 to 29 GHz, Average Power 5 W, Average Power Forward 5 W, Insertion Loss 0.6 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for C27A3 can be seen below.