The GL-T-2000-4000-18-100 from A-Info is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 100 W, Average Power Reverse 50 W, Insertion Loss 0.6 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for GL-T-2000-4000-18-100 can be seen below.