The VCI-380400 from VidaRF is a RF & Microwave Isolator with Frequency 38 to 40 GHz, Average Power Forward 25 W, Insertion Loss 1.1 dB, Isolation 17 dB, Operating Temperature -10 to 50 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for VCI-380400 can be seen below.