The FMIR1039 from Fairview Microwave is a RF & Microwave Isolator with Frequency 2 to 6 GHz, Average Power Forward 10 W, Insertion Loss 1.8 dB, Isolation 12 dB, Operating Temperature -20 to 70 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for FMIR1039 can be seen below.