The RFLI-406-4 from RF-Lambda is a RF & Microwave Isolator with Frequency 4 to 8 GHz, Average Power Forward 10 W, Average Power Reverse 1 W, Insertion Loss 0.8 dB, Isolation 40 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-406-4 can be seen below.