The RFLI-318-2 from RF-Lambda is a RF & Microwave Isolator with Frequency 3 to 4 GHz, Average Power Forward 10 W, Average Power Reverse 2 W, Insertion Loss 0.7 dB, Isolation 45 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFLI-318-2 can be seen below.