The FMIR1038 from Fairview Microwave is a RF & Microwave Isolator with Frequency 35 to 42.5 GHz, Average Power Forward 10 W, Insertion Loss 1.6 dB, Isolation 14 dB, Operating Temperature -20 to 70 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for FMIR1038 can be seen below.