The ISDJ-24 from MCLI is a RF & Microwave Isolator with Frequency 17 to 20 GHz, Average Power Forward 5 W, Insertion Loss 0.8 dB, Isolation 44 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Isolator. More details for ISDJ-24 can be seen below.