The SFI2640 from Fairview Microwave is a RF & Microwave Isolator with Frequency 26.5 to 40 GHz, Average Power Forward 5 W, Average Power Reverse 2 W, Peak Power Forward 0.03 kW, Insertion Loss 1 dB. Tags: Module with Connector, Coaxial Isolator. More details for SFI2640 can be seen below.