The FMIR1018 from Fairview Microwave is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 50 W, Average Power Reverse 2 W, Insertion Loss 1 dB, Isolation 40 dB. Tags: Module with Connectors, Coaxial Isolator. More details for FMIR1018 can be seen below.