The RFLI-402-4 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 0.5 dB, Isolation 19 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-402-4 can be seen below.