The QCI6237A from Qualwave is a RF & Microwave Isolator with Frequency 2000 to 8000 MHz, Bandwidth 6000 MHz, Average Power Forward 20 W, Average Power Reverse 5 W, Insertion Loss 1.3 to 1.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for QCI6237A can be seen below.